Set 3: Trigonometry (Beginner)

[Variation 1] **Choice B is the best answer.** cos = adjacent/hypotenuse = 8/10

Explanation

Answer: B

PROBLEM

Recent studies show that in a right triangle, the opposite side is 6, adjacent side is 8, and hypotenuse is 10. Find cos(angle).

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

10/6

8/10

✓ Correct

8/10

6/8

Detailed Explanation

[Variation 1] Choice B is the best answer. cos = adjacent/hypotenuse = 8/10

Why others are wrong:

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

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

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