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

  • A
    $\cos ^{2} 90^{\circ}$
  • B
    $\tan ^{2} 45^{\circ}$
  • C
    $\cos ^{2} 30^{\circ}$
  • D
    $\sin ^{2} 45^{\circ}$

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$\tan 1^{\circ} \tan 2^{\circ} \tan 3^{\circ} \ldots \tan 89^{\circ}$ का मान क्या है?

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यदि $\tan \theta = -\frac{4}{3}$ है,तो $\sin \theta = $

$\left(\frac{\sin 35^{\circ}}{\cos 55^{\circ}}\right)^2+\left(\frac{\cos 55^{\circ}}{\sin 35^{\circ}}\right)^2-2 \cos 30^{\circ}=$

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