यदि $\sin x + \sin^2 x = 1$ है,तो $\cos^{12} x + 3\cos^{10} x + 3\cos^8 x + \cos^6 x - 2$ का मान क्या होगा?

  • A
    $0$
  • B
    $1$
  • C
    $-1$
  • D
    $2$

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यदि $\tan \alpha = \frac{m}{m + 1}$ और $\tan \beta = \frac{1}{2m + 1}$ है,तो $\alpha + \beta = $

यदि $x=a(\sin \theta+\cos \theta)$ और $y=b(\sin \theta-\cos \theta)$ है,तो $\frac{x^{2}}{a^{2}}+\frac{y^{2}}{b^{2}}$ का मान ज्ञात कीजिए।

$\frac{(\tan 69^{\circ} + \tan 66^{\circ})}{(1 - \tan 69^{\circ} \tan 66^{\circ})}$ का मान है

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