Set 2: Trigonometry (Beginner)

**Choice B is the best answer.** cos = adjacent/hypotenuse = 8/10

Explanation

Answer: B

PROBLEM

In a right triangle, the opposite side is 6, adjacent side is 8, and hypotenuse is 10. Find cos(angle).

8/10

✓ Correct

10/6

6/8

Detailed Explanation

Choice B is the best answer. cos = adjacent/hypotenuse = 8/10

Why others are wrong:

A: 8/10 is incorrect because it does not satisfy the equation.

C: 10/6 is incorrect because it does not satisfy the equation.

D: 6/8 is incorrect because it does not satisfy the equation.