Set 2: Trigonometry (Beginner)

[Variation 1] **Choice C is the best answer.** cos = adjacent/hypotenuse = 4/5

Explanation

Answer: C

PROBLEM

Recent studies show that in a right triangle, the opposite side is 3, adjacent side is 4, and hypotenuse is 5. Find cos(angle).

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

4/5

5/3

4/5

✓ Correct

3/4

Detailed Explanation

[Variation 1] Choice C is the best answer. cos = adjacent/hypotenuse = 4/5

Why others are wrong:

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

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

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