9
Answer: DSet 1: Trigonometry (Beginner)
Explanation
PROBLEM
In a right triangle, the opposite side is 8, adjacent side is 15, and hypotenuse is 17. Find cos(angle).
In a right triangle, the opposite side is 8, adjacent side is 15, and hypotenuse is 17. Find cos(angle).
A.
15/17
B.
8/15
C.
17/8
D.✓ Correct
15/17
Detailed Explanation
Choice D is the best answer. cos = adjacent/hypotenuse = 15/17
Why others are wrong:
A: 15/17 is incorrect because it does not satisfy the equation.
B: 8/15 is incorrect because it does not satisfy the equation.
C: 17/8 is incorrect because it does not satisfy the equation.