turkey-yks 2010 Q18

turkey-yks · Other · lys1-math Quadratic trigonometric equations
$$3\sin x - 4\cos x = 0$$
Given this, what is the value of $|\cos 2x|$?
A) $\frac{3}{4}$
B) $\frac{3}{5}$
C) $\frac{4}{5}$
D) $\frac{7}{25}$
E) $\frac{9}{25}$
$$3\sin x - 4\cos x = 0$$

Given this, what is the value of $|\cos 2x|$?

A) $\frac{3}{4}$\\
B) $\frac{3}{5}$\\
C) $\frac{4}{5}$\\
D) $\frac{7}{25}$\\
E) $\frac{9}{25}$