turkey-yks 2015 Q25

turkey-yks · Other · lys1-math Quadratic trigonometric equations
For $0 \leq \mathrm { x } \leq \pi$,
$$\frac { \sin x \cdot \tan x } { 3 } = 1 - \cos x$$
What is the sum of the $\mathbf { x }$ values that satisfy this equation?
A) $\frac { \pi } { 3 }$
B) $\frac { 2 \pi } { 3 }$
C) $\frac { 4 \pi } { 3 }$
D) $\pi$
E) $2 \pi$
For $0 \leq \mathrm { x } \leq \pi$,

$$\frac { \sin x \cdot \tan x } { 3 } = 1 - \cos x$$

What is the sum of the $\mathbf { x }$ values that satisfy this equation?\\
A) $\frac { \pi } { 3 }$\\
B) $\frac { 2 \pi } { 3 }$\\
C) $\frac { 4 \pi } { 3 }$\\
D) $\pi$\\
E) $2 \pi$