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$\tan \left(1^{\circ}\right)+\tan \left(89^{\circ}\right)$ का मान क्या है?

त्रिकोणमितीय फलन $\tan \frac{19 \pi}{3}$ का मान ज्ञात कीजिए।

$\cos 1^{\circ} \cdot \cos 2^{\circ} \cdot \cos 3^{\circ} \dots \cos 179^{\circ} = $

$\frac{\sqrt{3} \sin \theta + \cos \theta}{\sin \left(\theta + \frac{\pi}{6}\right)} = $

सिद्ध कीजिए कि $3 \sin \frac{\pi}{6} \sec \frac{\pi}{3} - 4 \sin \frac{5 \pi}{6} \cot \frac{\pi}{4} = 1$.

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