Class 11

Trigonometrical Equations question bank (Maths)

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Q1.

If $\tan n\theta = \tan m\theta$,then the different values of $\theta$ will be in

(A)

$A.P.$

(B)

$G.P.$

(C)

$H.P.$

(D)

None of these

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Q2.

The value of $\cos y \cos (\frac{\pi}{2} - x) - \cos (\frac{\pi}{2} - y) \cos x + \sin y \cos (\frac{\pi}{2} - x) + \cos x \sin (\frac{\pi}{2} - y)$ is zero,if

(A)

$x = 0$

(B)

$y = 0$

(C)

$x = y$

(D)

$x = n\pi - \frac{\pi}{4} + y, (n \in I)$

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