$\frac{\sin 81^o + \cos 81^o}{\sin 81^o - \cos 81^o}$ का मान ज्ञात कीजिए।

  • A
    $\cot 9^o$
  • B
    $\tan 9^o$
  • C
    $\cot 54^o$
  • D
    $\tan 54^o$

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सिद्ध कीजिए कि $2 \sin ^{2} \frac{3 \pi}{4} + 2 \cos ^{2} \frac{\pi}{4} + 2 \sec ^{2} \frac{\pi}{3} = 10$.

सिद्ध कीजिए कि: $\cot ^{2} \frac{\pi}{6} + \csc \frac{5 \pi}{6} + 3 \tan ^{2} \frac{\pi}{6} = 6$

सिद्ध कीजिए कि:
$2 \sin ^{2} \frac{\pi}{6}+\csc ^{2} \frac{7 \pi}{6} \cos ^{2} \frac{\pi}{3}=\frac{3}{2}$

$\tan x + \frac{\cos x}{1 + \sin x} = $

सिद्ध कीजिए कि: $\sin ^{2} \frac{\pi}{6}+\cos ^{2} \frac{\pi}{3}-\tan ^{2} \frac{\pi}{4}=-\frac{1}{2}$

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