જો $\tan A + \tan B = x$ અને $\cot A + \cot B = y$ હોય,તો $\tan (A + B) =$

  • A
    $\frac{xy}{x-y}$
  • B
    $\frac{xy}{y-x}$
  • C
    $\frac{xy}{x+y}$
  • D
    $\frac{x-y}{xy}$

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$\frac{\cos 17^\circ + \sin 17^\circ}{\cos 17^\circ - \sin 17^\circ} = $

$\tan 5x \tan 3x \tan 2x = $

જો $A + C = B$ હોય,તો $\tan A \tan B \tan C = $

જો $\cos \theta = \frac{8}{17}$ અને $\theta$ એ $1^{st}$ ચરણમાં હોય,તો $\cos (30^\circ + \theta) + \cos (45^\circ - \theta) + \cos (120^\circ - \theta)$ ની કિંમત શોધો.

$\cos ^2\left(\frac{\pi}{6}+\theta\right)-\sin ^2\left(\frac{\pi}{6}-\theta\right)$ ની કિંમત શોધો.

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