यदि $a \tan \theta = b$ है,तो $a \cos 2\theta + b \sin 2\theta = $

  • A
    $a$
  • B
    $b$
  • C
    $-a$
  • D
    $-b$

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Similar Questions

यदि $\cos^3 \theta + \cos^3 \left(\frac{2 \pi}{3} + \theta\right) + \cos^3 \left(\frac{4 \pi}{3} + \theta\right) = \alpha \cos 3 \theta$ है,तो $\alpha$ का मान ज्ञात कीजिए।

$\tan \frac{\pi}{8}$ का मान क्या है?

$\tan 3A - \tan 2A - \tan A = $

सिद्ध कीजिए कि: $\cos 6x = 32 \cos^6 x - 48 \cos^4 x + 18 \cos^2 x - 1$

$3 \tan^6 10^{\circ} - 27 \tan^4 10^{\circ} + 33 \tan^2 10^{\circ} = $

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