यदि $\sin A = \frac{1}{\sqrt{10}}$ और $\sin B = \frac{1}{\sqrt{5}}$,जहाँ $A$ और $B$ धनात्मक न्यून कोण हैं,तो $A + B = $

  • A
    $\pi$
  • B
    $\pi/2$
  • C
    $\pi/3$
  • D
    $\pi/4$

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यदि $\tan \theta = \frac{\cos 25^{\circ} + \sin 25^{\circ}}{\cos 25^{\circ} - \sin 25^{\circ}}$ और $\theta$ तीसरे चतुर्थांश में है,तो $\theta =$ ($^{\circ}$ में)

यदि $\frac{x}{\cos \theta} = \frac{y}{\cos \left( \theta - \frac{2\pi}{3} \right)} = \frac{z}{\cos \left( \theta + \frac{2\pi}{3} \right)},$ है,तो $x + y + z = $

$\tan 20^\circ + \tan 40^\circ + \sqrt{3} \tan 20^\circ \tan 40^\circ = $

यदि $\cos (A + B) = \alpha \cos A \cos B + \beta \sin A \sin B$ है,तो $(\alpha, \beta) =$

यदि $\cos (\theta+\phi)=\frac{3}{5}$ और $\sin (\theta-\phi)=\frac{5}{13}$, जहाँ $0 < \theta, \phi < \frac{\pi}{4}$, तो $\cot (2 \theta)$ का मान ज्ञात कीजिए:

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