$\tan 9^\circ - \tan 27^\circ - \tan 63^\circ + \tan 81^\circ = $

  • A
    $1/2$
  • B
    $2$
  • C
    $4$
  • D
    $8$

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$2(\sin^6 \theta + \cos^6 \theta) - 3(\sin^4 \theta + \cos^4 \theta) + 1$ का मान ज्ञात कीजिए।

$\cos 20^\circ \cos 40^\circ \cos 80^\circ = $

$\cos^2 10^\circ - \cos 10^\circ \cos 50^\circ + \cos^2 50^\circ$ का मान क्या है?

Difficult
View Solution

यदि $\operatorname{cosec}^{2} \theta = \frac{4xy}{(x+y)^{2}}$ है,तो

$\frac{1}{4} \tan \frac{\pi}{8} + \frac{1}{8} \tan \frac{\pi}{16} + \frac{1}{16} \tan \frac{\pi}{32} + \dots \infty$ पदों का मान किसके बराबर है?

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