Podcast
Questions and Answers
Which of the following describes the trigonometric ratio?
Which of the following describes the trigonometric ratio?
- A ratio of two sides of an acute triangle
- A ratio of two sides of a right triangle (correct)
- A ratio of two angles of an acute triangle
- A ratio of two angles of a right triangle
What is the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse called?
What is the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse called?
- Sine
- Cotangent
- Tangent
- Cosine (correct)
What is the ratio of the length of the side opposite an acute angle to the length of the hypotenuse called?
What is the ratio of the length of the side opposite an acute angle to the length of the hypotenuse called?
- Cosine
- Sine (correct)
- Tangent
- Cotangent
Which of the following is the trigonometric ratio for a 30-degree angle in a right triangle?
Which of the following is the trigonometric ratio for a 30-degree angle in a right triangle?
What is the trigonometric ratio for a 45-degree angle in a right triangle?
What is the trigonometric ratio for a 45-degree angle in a right triangle?
What is the trigonometric ratio for a 60-degree angle in a right triangle?
What is the trigonometric ratio for a 60-degree angle in a right triangle?
Which of the following is the trigonometric ratio for a 90-degree angle in a right triangle?
Which of the following is the trigonometric ratio for a 90-degree angle in a right triangle?
What is the trigonometric ratio for a 0-degree angle in a right triangle?
What is the trigonometric ratio for a 0-degree angle in a right triangle?
What is the trigonometric ratio for a 45-degree angle in a right triangle?
What is the trigonometric ratio for a 45-degree angle in a right triangle?
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Study Notes
Trigonometric Ratios
- The ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse is called cosine.
- The ratio of the length of the side opposite an acute angle to the length of the hypotenuse is called sine.
- The ratio of the length of the side opposite an angle to the length of the side adjacent to the angle is called tangent.
- The trigonometric ratio for a 30-degree angle in a right triangle is 1/2.
- The trigonometric ratio for a 45-degree angle in a right triangle is 1/√2 or √2/2.
- The trigonometric ratio for a 60-degree angle in a right triangle is √3/2.
- There is no trigonometric ratio for a 90-degree angle in a right triangle, as the ratio is undefined.
- The trigonometric ratio for a 0-degree angle in a right triangle is 0.
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