$2\sin^2 \beta + 4\cos(\alpha + \beta)\sin \alpha \sin \beta + \cos 2(\alpha + \beta) = $

  • A
    $\sin 2\alpha$
  • B
    $\cos 2\beta$
  • C
    $\cos 2\alpha$
  • D
    $\sin 2\beta$

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$\sin 105^{\circ} + \cos 105^{\circ}$ का मान क्या है?

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यदि दो कोणों का योग और अंतर क्रमशः $\pi$ और $\frac{\pi}{12}$ है,तो डिग्री माप में कोणों के मान ($^{\circ}$ में) ज्ञात कीजिए।

यदि $\sin A = \frac{3}{5}$,$\tan B = \frac{1}{2}$ और $\frac{\pi}{2} < A < \pi < B < \frac{3\pi}{2}$ है,तो $8 \tan A - \sqrt{5} \sec B$ का मान ज्ञात कीजिए।

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