Set 3: Trigonometry (Intermediate)

[Variation 3] **Choice D is the best answer.** sin = opposite/hypotenuse = 3/5

Explanation

Answer: D

PROBLEM

Researchers have observed that in a right triangle, the opposite side is 3, adjacent side is 4, and hypotenuse is 5. Find sin(angle).

In a right triangle, the opposite side is 3, adjacent side is 4, and hypotenuse is 5. Find sin(angle).

5/3

4/5

3/4

3/5

✓ Correct

Detailed Explanation

[Variation 3] Choice D is the best answer. sin = opposite/hypotenuse = 3/5

Why others are wrong:

A: 5/3 is incorrect because it does not satisfy the equation.

B: 4/5 is incorrect because it does not satisfy the equation.

C: 3/4 is incorrect because it does not satisfy the equation.