यदि $3 \cos \theta + 4 \sin \theta = 5$ है,तो $3 \sin \theta - 4 \cos \theta$ का मान ज्ञात कीजिए।

  • A
    $1$
  • B
    $-1$
  • C
    $0$
  • D
    $\frac{1}{2}$

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यदि $\cos 2B = \frac{\cos(A+C)}{\cos(A-C)}$ है,तो $\tan A, \tan B, \tan C$ किसमें हैं?

$\cos ^4 \frac{\pi}{8}+\cos ^4 \frac{2 \pi}{8}+\cos ^4 \frac{3 \pi}{8}+\cos ^4 \frac{4 \pi}{8}+\cos ^4 \frac{5 \pi}{8}+\cos ^4 \frac{6 \pi}{8}+\cos ^4 \frac{7 \pi}{8}+\cos ^4 \frac{8 \pi}{8}$ का मान ज्ञात कीजिए।

यदि $\frac{\cos x}{\cos (x-2 y)}=\lambda$ है,तो $\tan (x-y) \tan y$ का मान क्या होगा?

$\frac{\sin^2 3A}{\sin^2 A} - \frac{\cos^2 3A}{\cos^2 A}$ का मान है

यदि $\cos \alpha + \cos \beta = a$,$\sin \alpha + \sin \beta = b$ और $\alpha - \beta = 2 \theta$ है,तो $\frac{\cos 3 \theta}{\cos \theta} = $

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