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Questions and Answers

What is the correct definition of the sine function based on the right triangle definition?

  • sin(θ) = adjacent / hypotenuse
  • sin(θ) = opposite / adjacent
  • sin(θ) = opposite / hypotenuse (correct)
  • sin(θ) = hypotenuse / opposite

Which of the following statements correctly represents the domain of the tangent function?

  • θ can be any angle except 90 degrees
  • θ cannot equal nÏ€, where n is any integer
  • θ can be any angle
  • θ cannot equal n + Ï€, where n is any integer (correct)

What is the period of the function cos(ωθ)?

  • 2πω
  • 2Ï€
  • ω (correct)
  • Ï€

What does the cosecant function equal in terms of sine?

<p>csc(θ) = hypotenuse / opposite (D)</p> Signup and view all the answers

Which of the following functions has the same periodicity as the sine function?

<p>csc(θ) (D)</p> Signup and view all the answers

What is the relationship between secant and cosine?

<p>sec(θ) = 1 / cos(θ) (D)</p> Signup and view all the answers

In terms of the unit circle, which coordinates correspond to the sine function?

<p>(cos(θ), sin(θ)) (B)</p> Signup and view all the answers

Which of the following is NOT defined for the cosecant function?

<p>nπ where n is any integer (B)</p> Signup and view all the answers

Which of the following statements about the range of the sine function is true?

<p>The sine function ranges from -1 to 1. (C)</p> Signup and view all the answers

Which identity correctly represents the relationship between tangent and cotangent?

<p>tan(θ) = 1/cot(θ) (B)</p> Signup and view all the answers

Which of the following ranges is correct for the cosecant function?

<p>csc(θ) ≥ 1 and csc(θ) ≤ −1 (D)</p> Signup and view all the answers

What is the correct expression to define tan(θ) using sine and cosine?

<p>tan(θ) = sin(θ)/cos(θ) (B)</p> Signup and view all the answers

The inverse function sin^(-1)(x) is defined for which domain?

<p>−1 ≤ x ≤ 1 (D)</p> Signup and view all the answers

What is the formula for the sine of a double angle?

<p>sin(2θ) = 2sin(θ)cos(θ) (D)</p> Signup and view all the answers

Which of the following statements about the periodic properties of sine is correct?

<p>sin(θ + 2π) = sin(θ) (D)</p> Signup and view all the answers

In which scenario is the cosecant function undefined?

<p>When sin(θ) = 0 (B)</p> Signup and view all the answers

What is the result of applying the Even/Odd formula to the cosine function?

<p>cos(-θ) = cos(θ) (B)</p> Signup and view all the answers

What is the domain of the function tan^(-1)(x)?

<p>−∞ &lt; x &lt; ∞ (A)</p> Signup and view all the answers

Which identity accurately describes the relationship between the cosine and sine of complementary angles?

<p>Both B and C are correct. (B)</p> Signup and view all the answers

Which of the following is not a Pythagorean identity?

<p>tan²(θ) + 1 = cot²(θ) (B)</p> Signup and view all the answers

Which of the following is the definition of the cosecant function?

<p>csc(θ) = 1/sin(θ) (D)</p> Signup and view all the answers

The formula for the secant function is derived from which basic function?

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

Flashcards

Sine of an angle

In a right triangle, the ratio of the side opposite to the angle to the hypotenuse.

Cosine of an angle

In a right triangle, the ratio of the side adjacent to the angle to the hypotenuse.

Tangent of an angle

In a right triangle, the ratio of the side opposite to the angle to the side adjacent to the angle.

Period of a function

The number T such that f(θ + T) = f(θ) for any angle θ.

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Sin function domain

All angles.

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Cos function domain

All angles.

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Tan function domain

All angles except odd multiples of π/2.

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Period of Sin(ωθ)

2π/ω

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Range of sin(θ)

The range of the sine function is all values between -1 and 1, inclusive. -1 ≤ sin(θ) ≤ 1

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Range of cos(θ)

The range of the cosine function is all values between -1 and 1, inclusive. -1 ≤ cos(θ) ≤ 1

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Range of tan(θ)

The range of the tangent function is all real numbers. −∞ < tan(θ) < ∞

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Range of cot(θ)

The range of the cotangent function is all real numbers. −∞ < cot(θ) < ∞

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Range of sec(θ)

The range of the secant function includes values greater than or equal to 1, and less than or equal to -1. sec(θ) ≥ 1 and sec(θ) ≤ −1

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Range of csc(θ)

The range of the cosecant function includes values greater than or equal to 1, and less than or equal to -1. csc(θ) ≥ 1 and csc(θ) ≤ −1

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sin(θ) + sin(β)

Sum-to-product formula for sine adds to 2 sin((α+β)/2) cos((α-β)/2)

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cos(θ) + cos(β)

Sum-to-product formula for cosine adds to 2 cos((α+β)/2) cos((α-β)/2)

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sin(2θ)

Double angle formula; equal to 2sin(θ)cos(θ)

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cos(2θ)

Double angle formula; equal to cos²(θ) − sin²(θ) or 2cos²(θ) -1

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Periodicity of trig functions

Trigonometric functions repeat every 2π radians (or 360 degrees) for sine and cosine and every π radians (or 180 degrees) for tangent and cotangent.

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