Set 3: Trigonometry (Beginner)

**Choice A is the best answer.** sin = opposite/hypotenuse = 5/13

Explanation

Answer: A

PROBLEM

In a right triangle, the opposite side is 5, adjacent side is 12, and hypotenuse is 13. Find sin(angle).

5/13

✓ Correct

13/5

12/13

5/12

Detailed Explanation

Choice A is the best answer. sin = opposite/hypotenuse = 5/13

Why others are wrong:

B: 13/5 is incorrect because it does not satisfy the equation.

C: 12/13 is incorrect because it does not satisfy the equation.

D: 5/12 is incorrect because it does not satisfy the equation.