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જો $\tan A = \frac{1}{2}$ હોય,તો $\tan 3A = $

જો $\cot \frac{2x}{3} + \tan \frac{x}{3} = \operatorname{cosec} \frac{kx}{3}$ હોય, તો $k$ ની કિંમત શોધો.

$\frac{\sec 8A - 1}{\sec 4A - 1} = $

ધારો કે $n$ એક એકી પૂર્ણાંક છે. જો દરેક $\theta$ માટે $\sin n\theta = \sum\limits_{r = 0}^n {{b_r}{{\sin }^r}\theta } $ હોય,તો

$\cos 15^\circ = $

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