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Trigonometrical Equations
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यदि $\cos p\theta = \cos q\theta ,p \ne q$, तो
A
$\theta = 2n\pi $
B
$\theta = \frac{{2n\pi }}{{p \pm q}}$
C
$\theta = \frac{{n\pi }}{{p + q}}$
D
इनमें से कोई नहीं
Solution
(b) $\cos p\theta = \cos q\theta $
$\Rightarrow p\theta = 2n\pi \pm q\theta$
$\Rightarrow \theta = \frac{{2n\pi }}{{p \pm q}}$.
Standard 11
Mathematics
