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

Answer:

             C. x

Step-by-step explanation:

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

$\cos(\angle A)=\dfrac{AB}{AC}=\sin(\angle C)=x$