Trigonometric Equations Question 375
Question: If $ \cos p\theta =\cos q\theta ,p\ne q $ , then
[MP PET 1995]
Options:
A) $ \theta =2n\pi $
B) $ \theta =\frac{2n\pi }{p\pm q} $
C) $ \theta =\frac{n\pi }{p+q} $
D) None of these
Show Answer
Answer:
Correct Answer: B
Solution:
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$ \cos p\theta =\cos q\theta \Rightarrow p\theta =2n\pi \pm q\theta \Rightarrow \theta =\frac{2n\pi }{p\pm q} $ .
BETA
