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यदि $\alpha, \beta$ न्यून कोण इस प्रकार हैं कि $\sin \beta=2 \sin \alpha$ और $3 \cos \beta=2 \cos \alpha$,तो $\sec (\alpha+\beta)=$

$\tan 40^{\circ} + \tan 11^{\circ} + \tan 20^{\circ} - \tan 56^{\circ} + \tan 56^{\circ} \tan 11^{\circ} + \sqrt{3} \tan 40^{\circ} \tan 20^{\circ}$ का मान है

यदि $\sec \theta + \tan \theta = \frac{1}{3}$ है,तो $2 \theta$ किस चतुर्थांश में स्थित है?

यदि $\frac{\cos x}{\cos (x-2 y)}=\lambda$ है,तो $\tan (x-y) \tan y$ का मान क्या होगा?

मान ज्ञात कीजिए: $\cos^2 \left( \frac{\pi}{4} - \beta \right) - \sin^2 \left( \alpha - \frac{\pi}{4} \right)$

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