$\sin \theta \cdot \cos (90^\circ - \theta) = \ldots \ldots \ldots$

  • A
    $\tan \theta$
  • B
    $\sin^2 \theta$
  • C
    $\cos^2 \theta$
  • D
    $\sin \theta \cdot \sec \theta$

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$(1-\cos \theta)(1+\cos \theta) = \dots$

$\sin 60^{\circ} \cdot \cos 30^{\circ} + \cos 60^{\circ} \cdot \sin 30^{\circ} = ..........$

यदि $5 \cos A = 4 \sin A$,तो $\tan A = \ldots$

यदि $\sin A + \sin^2 A = 1$ है,तो व्यंजक $(\cos^2 A + \cos^4 A)$ का मान क्या है?

Difficult
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सिद्ध कीजिए कि,$\tan \theta + \tan (90^{\circ} - \theta) = \sec \theta \sec (90^{\circ} - \theta)$

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