Trigonometry Problems and Ratios
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Questions and Answers

If $\sin(35^\circ) = \frac{30}{x}$, what is the value of x rounded to the nearest tenth?

  • 25.6
  • 52.3
  • 52.9 (correct)
  • 17.2

If $\cos(27^\circ)=\frac{16}{x}$, then x is approximately 17.9.

True (A)

If $\tan(70^\circ) = \frac{x}{18}$, what is x rounded to the nearest tenth?

49.5

If $\sin(58^\circ) = \frac{29}{x}$, then x is approximately ______ when rounded to the nearest tenth.

<p>34.1</p> Signup and view all the answers

Match the trigonometric function with its corresponding ratio, given angle $\theta$ and sides opposite, adjacent and hypotenuse from said angle:

<p>$\sin(\theta)$ = opposite/hypotenuse $\cos(\theta)$ = adjacent/hypotenuse $\tan(\theta)$ = opposite/adjacent</p> Signup and view all the answers

A right triangle has an adjacent side of 4 and an opposite side of 14. What is the measure of the angle opposite the side of length 4 (to the nearest degree)?

<p>74° (D)</p> Signup and view all the answers

Given: a right triangle with an adjacent side of 29 and the hypotenuse of 59. The angle adjacent to the side of length 29 is approximately 29.94 degrees.

<p>False (B)</p> Signup and view all the answers

In a right triangle, if the adjacent side is 7 and the hypotenuse is 9, what is the approximate measure of the angle adjacent to the side of length 7 (to the nearest degree)?

<p>39</p> Signup and view all the answers

If the opposite side of a right triangle is 35 and the adjacent side is 8, the angle opposite the side of length 35, rounded to the nearest degree, is ______.

<p>77</p> Signup and view all the answers

Match the trigonometric ratio with the correct calculation:

<p>$sin(x)$ = Opposite / Hypotenuse $cos(x)$ = Adjacent / Hypotenuse $tan(x)$ = Opposite / Adjacent</p> Signup and view all the answers

What is the approximate length of the side adjacent to the 73-degree angle in a right triangle, if the opposite side is 18 units long?

<p>5.9 (B)</p> Signup and view all the answers

In a right triangle with a 60-degree angle and an opposite side of length 11, the adjacent side is approximately 9.8.

<p>False (B)</p> Signup and view all the answers

A right triangle has a 22-degree angle and one side of 12 units opposite this angle. What is the approximate length of the adjacent side?

<p>7.7</p> Signup and view all the answers

In a right triangle, if the angle is 17 degrees and the side opposite this angle is 16, the adjacent side is approximately ______.

<p>57.3</p> Signup and view all the answers

Match the angle and side length with the approximate length of the adjacent side using the tangent function:

<p>23 degrees, opposite side 20 = 8.5 39 degrees, opposite side 10 = 12.8 61 degrees, opposite side 14 = 7.8 44 degrees, opposite side 17 = 17.3</p> Signup and view all the answers

In a right triangle with an angle of $59^{\circ}$ and an adjacent side of 11, what is the length of the opposite side, rounded to the nearest tenth?

<p>18.3 (B)</p> Signup and view all the answers

If a triangle has a $21^{\circ}$ angle, and the side opposite to that angle is 19, the adjacent side of the triangle will be approximately 49.6.

<p>True (A)</p> Signup and view all the answers

In a right triangle with a $67^{\circ}$ angle, the length of the side opposite to the angle is 19. What is the approximate length of the side adjacent to that angle, rounded to the nearest tenth?

<p>8.0</p> Signup and view all the answers

In a right triangle, with a $43^{\circ}$ angle, if the side adjacent to the angle measures $19$, then the length of the opposite side of the triangle is approximately ____.

<p>17.7</p> Signup and view all the answers

Match the given triangle angle and side information to the appropriate calculation for the length, x:

<p>Angle $46^{\circ}$, opposite side x, adjacent side 16 = $x = 16 \times \text{tan }46^{\circ}$ Angle $67^{\circ}$, opposite side 19, adjacent side x = $x = \frac{19}{\text{tan }67^{\circ}}$ Angle $52^{\circ}$, opposite side 17, adjacent side x = $x = \frac{17}{\text{tan }52^{\circ}}$ Angle $24^{\circ}$, opposite side 24, adjacent side x = This information is not sufficient to calculate x.</p> Signup and view all the answers

In a right triangle, if the angle is 27 degrees and the opposite side is 5, what is the length of the adjacent side, rounded to the nearest tenth?

<p>9.8 (C)</p> Signup and view all the answers

Given a right triangle with a 62-degree angle and an adjacent side of 38, the hypotenuse is approximately 50.5 when rounded to the nearest tenth.

<p>False (B)</p> Signup and view all the answers

In a right triangle with a 39-degree angle and an adjacent side of 40, what is the length of the opposite side, rounded to the nearest tenth?

<p>32.4</p> Signup and view all the answers

In a right triangle with a 18-degree angle and a hypotenuse of 48, the length of the opposite side can be calculated using the _______ function.

<p>sine</p> Signup and view all the answers

Match the trigonometric functions with their correct ratios in a right triangle

<p>Sine = Opposite / Hypotenuse Cosine = Adjacent / Hypotenuse Tangent = Opposite / Adjacent</p> Signup and view all the answers

A 30 ft ladder leans against a building, forming a 70° angle with the ground. Approximately how far is the base of the ladder from the building?

<p>28.2 ft (A)</p> Signup and view all the answers

If a tree casts a 32 foot shadow and the angle of elevation of the sun is 58°, then the height of the tree is approximately 30 feet.

<p>False (B)</p> Signup and view all the answers

A kite is flying with 100 ft of string at an angle of 80°. If the spool is 5 ft above the ground, approximately how high is the kite above the ground?

<p>103.5 ft</p> Signup and view all the answers

From the top of a 230 ft lighthouse, the angle of depression to the boat at sea is 42°. The approximate distance from the boat to the foot of the lighthouse is ______ ft.

<p>255.4</p> Signup and view all the answers

Simon wants a sign for his building. The angle of elevation to the roof is 31°, and to the top of the sign is 42°. Point P is 24 ft from the building. Approximately how tall is the sign?

<p>6.9 ft (C)</p> Signup and view all the answers

A tree leaning at a 24° angle against a building, with a length of 20 ft, results in a building height of approximately 20 ft.

<p>False (B)</p> Signup and view all the answers

Match the scenarios to the trigonometric functions used for their solution:

<p>Ladder against building (base distance) = sine Tree height from its shadow = tangent Kite height above the ground = sine Distance from boat to the lighthouse foot = tangent</p> Signup and view all the answers

If a tree casts a 32-foot shadow and the angle of elevation of the sun is 58°, provide the formula for finding the height of the tree. (Use trigonometric function and variable x to represent the tree height).

<p><code>tan(58°) = x / 32</code></p> Signup and view all the answers

Flashcards

Sine (Sin)

A trigonometric function that relates the opposite side of a right triangle to the hypotenuse. It is defined as the ratio of the opposite side to the hypotenuse.

Cosine (Cos)

A trigonometric function that relates the adjacent side of a right triangle to the hypotenuse. It is defined as the ratio of the adjacent side to the hypotenuse.

Tangent (Tan)

A trigonometric function that relates the opposite side of a right triangle to the adjacent side. It is defined as the ratio of the opposite side to the adjacent side.

What does the sine of an angle represent in a right triangle?

The ratio of the length of the opposite side to the length of the hypotenuse in a right triangle.

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Right Triangle Trigonometry

The process of using trigonometric functions to find the missing sides or angles of a right triangle.

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What is the tangent function?

The trigonometric function that relates the opposite side to the adjacent side of a right triangle.

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Solve for the adjacent side using the tangent function.

A right triangle where the opposite side is known, and the adjacent side needs to be determined.

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How do you use the tangent function to solve for the missing side?

Utilizing the tangent function formula and the known values (angle and opposite side), solve for the unknown side.

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How do you round the answer when solving for the missing side?

The answer is rounded to the nearest tenth, which means only one decimal place is considered.

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Calculating the missing side using the tangent function.

The process of finding the missing side of a right triangle using the tangent function and solving the resulting equation.

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What is slope?

The slope of a line is a measure of how steep it is. It is calculated by dividing the change in the y-coordinates by the change in the x-coordinates.

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What is a slope triangle?

A slope triangle is a right triangle used to find the slope of a line. The hypotenuse of the triangle is the line segment that represents the slope. The legs of the triangle are the horizontal and vertical distances that correspond to the change in x and y coordinates.

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What is the tangent (tan) function?

The tangent (tan) function in trigonometry relates the lengths of the opposite and adjacent sides to an angle in a right triangle.

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How can you find the missing side of a slope triangle?

To find the missing side of a slope triangle, we can utilize the tangent function. We know the angle and one side length. By setting up a proportion with the tangent function, we can solve for the unknown side.

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How can you use a slope triangle to find the slope?

A slope triangle can be used to find the slope of a line. The slope is equal to the ratio of the vertical side (rise) to the horizontal side (run) of the triangle.

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How to find x using tangent

The tangent of an angle is the ratio of the opposite side to the adjacent side. To find the value of x, you can use the formula: Tan(angle) = opposite / adjacent.

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How to find x using cosine

The cosine of an angle is the ratio of the adjacent side to the hypotenuse. To find the value of x, you can use the formula: Cos(angle) = adjacent / hypotenuse.

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How to find x using sine

The sine of an angle is the ratio of the opposite side to the hypotenuse. To find the value of x, you can use the formula: Sin(angle) = opposite / hypotenuse.

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The Pythagorean Theorem

The Pythagorean Theorem states that in a right triangle, the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides. You can use this theorem to find the length of a missing side in a right triangle.

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Steps to find x in a right triangle

To find the value of x, you need to apply the appropriate trigonometric function (sine, cosine, or tangent) based on the information given in the diagram. Then, you can rearrange the formula to solve for x.

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Inverse Sine (sin⁻¹)

The inverse sine function, denoted as sin⁻¹, calculates the angle whose sine is a given value. It's essential for finding angles in right triangles when you know the opposite side and the hypotenuse.

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Inverse Cosine (cos⁻¹)

The inverse cosine function, denoted as cos⁻¹, determines the angle whose cosine is a given value. It's crucial when you have the adjacent side and the hypotenuse of a right triangle.

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Inverse Tangent (tan⁻¹)

The inverse tangent function, represented as tan⁻¹, calculates the angle whose tangent is a given value. It's useful when you have the opposite side and the adjacent side of a right triangle.

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Solving for Angles in Right Triangles

Applying inverse trigonometric functions (sin⁻¹, cos⁻¹, tan⁻¹) lets you solve for unknown angles within right triangles.

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Range of Inverse Trigonometric Functions

When using inverse trigonometric functions, make sure the value you input is within the appropriate range for the function. For example, the sine function has a range of [-1, 1].

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Sine

The trigonometric function that relates the opposite side of a right triangle to its hypotenuse.

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Cosine

The trigonometric function that relates the adjacent side of a right triangle to its hypotenuse.

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Tangent

The trigonometric function that relates the opposite side of a right triangle to its adjacent side.

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Angle of Elevation

In a right triangle, the angle formed between the ground and the base of an object.

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Right Triangle

A right triangle is a triangle with one angle measuring 90 degrees.

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Trigonometric Problem Solving

To solve for an unknown side of a right triangle using trigonometric functions, you need two pieces of information.

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Distance

The distance from the point of observation (such as a person) to the base of the object being observed.

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Height

The height of an object above the ground level.

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