निम्नलिखित में से कौन सा सही नहीं है?

  • A
    $\cos 5 \pi = \cos 4 \pi$
  • B
    $\sin 2 \pi = \sin (-2 \pi)$
  • C
    $\sin 4 \pi = \sin 6 \pi$
  • D
    $\tan 45^{\circ} = \tan (-315^{\circ})$

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यदि $\sin x = -\frac{24}{25}$ है,तो $\tan x$ का मान ज्ञात कीजिए।

$\sin \frac{\pi}{5} + \sin \frac{2\pi}{5} + \sin \frac{3\pi}{5} + \sin \frac{4\pi}{5} =$

$\sin ^2 \frac{2 \pi}{3}+\cos ^2 \frac{5 \pi}{6}-\tan ^2 \frac{3 \pi}{4}=$

$\sin ^{2} 17.5^{\circ} + \sin ^{2} 72.5^{\circ}$ का मान ज्ञात कीजिए।

व्यंजक $[1 - \sin(3\pi - \alpha) + \cos(3\pi + \alpha)] [1 - \sin(\frac{3\pi}{2} - \alpha) + \cos(\frac{5\pi}{2} - \alpha)]$ को सरल करने पर क्या प्राप्त होता है?

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