यदि $\frac{\cos (A+B)}{\cos (A-B)}=\frac{\sin (C+D)}{\sin (C-D)}$,तो $\tan A \tan B \tan C=$

  • A
    $0$
  • B
    $\tan D$
  • C
    $\cot D$
  • D
    $-\tan D$

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यदि $\tan^2 \alpha \tan^2 \beta + \tan^2 \beta \tan^2 \gamma + \tan^2 \gamma \tan^2 \alpha + 2\tan^2 \alpha \tan^2 \beta \tan^2 \gamma = 1$ है,तो $\sin^2 \alpha + \sin^2 \beta + \sin^2 \gamma$ का मान क्या है?

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$\tan \frac{\pi}{5}+2 \tan \frac{2 \pi}{5}+4 \cot \frac{4 \pi}{5}$ का मान ज्ञात कीजिए।

$\sin 20^{\circ}(4+\sec 20^{\circ})=$

मान लीजिए $f_k(x) = \frac{1}{k}(\sin^k x + \cos^k x)$,जहाँ $x \in R$ और $k \ge 1$ है। तो $f_4(x) - f_6(x)$ का मान ज्ञात कीजिए।

सबसे छोटा पूर्णांक $n$ ज्ञात कीजिए जिसके लिए $\frac{1}{\sin 45^{\circ} \sin 46^{\circ}}+\frac{1}{\sin 47^{\circ} \sin 48^{\circ}}+\ldots+\frac{1}{\sin 133^{\circ} \sin 134^{\circ}}=\frac{1}{\sin \left(n^{\circ}\right)}$ हो।

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