Question

EXPLANATION NEEDED:

In right triangle ABC, ∠ B is a right angle and sin ∠ C = x. cos ∠ A =

a. √x² - 1
b. √1 - x²
c. x
d. √x² + 1
e. x²

Answer 1

C. x

Explanation:

AC denotes the length of the hypotenuse and AB and BC denote the lengths of the other two sides, so:

`\cos(\angle A)=(AB)/(AC)=\sin(\angle C)=x`