Question

The general solution of sin $3x + sin\, x - 3 \,sin 2x$ = $cos\, 3x + cos\, x - 3 cos \,2x$ is

• A. $\frac{n\pi}{2}+\frac{\pi}{8}$ for n integer
• B. $\frac{n\pi}{2}-\frac{\pi}{8}$ for n integer
• C. $n\pi + \frac{\pi}{8}$ for n integer
• D. $n\pi - \frac{\pi}{8}$ for n integer

Answer 1

Answer: (A)

$\frac{n\pi}{2}+\frac{\pi}{8}$ for n integer

Answer 2

Answer (a) $\frac{n\pi}{2}+\frac{\pi}{8}$ for n integer