AP EAMCET · Maths · Trigonometric Equations
If \(x \neq(2 n+1) \frac{\pi}{4}\), then the general solution of \(\cos x+\cos 3 x=\sin x+\sin 3 x\) is
- A \(\mathrm{n} \pi+\frac{\pi}{8}\)
- B \(\mathrm{n} \pi \pm \frac{\pi}{8}\)
- C \(\frac{n \pi}{2} \pm \frac{\pi}{8}\)
- D \(\frac{n \pi}{2}+\frac{\pi}{8}\)
Answer & Solution
Correct Answer
(D) \(\frac{n \pi}{2}+\frac{\pi}{8}\)
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