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यदि $\alpha$ दूसरे चतुर्थांश में स्थित है,तो $\sqrt{\frac{1 - \sin \alpha}{1 + \sin \alpha}} - \sqrt{\frac{1 + \sin \alpha}{1 - \sin \alpha}} = $

$\cot (45^\circ + \theta ) \cot (45^\circ - \theta ) = $

यदि $\sin x = \frac{3}{5}$ और $x$ दूसरे चतुर्थांश में स्थित है,तो अन्य पाँच त्रिकोणमितीय फलनों के मान ज्ञात कीजिए।

$\cos 1200^{\circ} + \tan 1485^{\circ}$ का मान है

$\frac{\sin 70^\circ + \cos 40^\circ}{\cos 70^\circ + \sin 40^\circ} = $

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