Set 5: Trigonometry (Beginner)

[Variation 2] **Choice D is the best answer.** cos = adjacent/hypotenuse = 4/5

Explanation

Answer: D

PROBLEM

Intriguingly, 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

3/4

4/5

✓ Correct

Detailed Explanation

[Variation 2] Choice D 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.

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