यदि $\tan (\pi \cos \theta ) = \cot (\pi \sin \theta )$ है,तो $\cos \left( \theta - \frac{\pi }{4} \right)$ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{2\sqrt{2}}$
  • B
    $\frac{1}{\sqrt{2}}$
  • C
    $\frac{1}{3\sqrt{2}}$
  • D
    $\frac{1}{4\sqrt{2}}$

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$\triangle ABC$ में,यदि $\angle C = 90^{\circ}$ है,तो $\frac{(\sin^2 A + \sin^2 B)}{(\sin^2 A - \sin^2 B)} \sin(A - B) = $

यदि $p = \frac{2\sin \theta}{1 + \cos \theta + \sin \theta}$ और $q = \frac{\cos \theta}{1 + \sin \theta}$ है,तो

मान ज्ञात कीजिए: $\left(1+\cos \frac{\pi}{8}\right)\left(1+\cos \frac{3 \pi}{8}\right)\left(1+\cos \frac{5 \pi}{8}\right)\left(1+\cos \frac{7 \pi}{8}\right)$

यदि $A = \frac{\sin 3^\circ}{\cos 9^\circ} + \frac{\sin 9^\circ}{\cos 27^\circ} + \frac{\sin 27^\circ}{\cos 81^\circ}$ और $B = \tan 81^\circ - \tan 3^\circ$ है, तो $\frac{B}{A}$ का मान . . . . . . है।

$\frac{\sin 3A - \cos \left( \frac{\pi}{2} - A \right)}{\cos A + \cos (\pi + 3A)} = $

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