Geometry and TrigonometryEasySine as a ratio of sides
Geometry and Trigonometry practice question
A right triangle has legs of length 3 and 4 and a hypotenuse of length 5. What is the sine of the angle opposite the side of length 3?
- A. 3/5Correct
- B. 4/5
- C. 3/4
- D. 5/3
Answer: A. 3/5
Sine is opposite over hypotenuse: 3/5.
Why the other answers are wrong
- B. 4/5
- 4/5 is the sine of the other acute angle (or the cosine of this one).
- C. 3/4
- 3/4 is the tangent.
- D. 5/3
- 5/3 inverts the ratio.
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