જો $A = 580^\circ$ હોય,તો નીચેનામાંથી કયું વિધાન સાચું છે?

  • A
    $2 \sin \left( \frac{A}{2} \right) = \sqrt{1 + \sin A} - \sqrt{1 - \sin A}$
  • B
    $2 \sin \left( \frac{A}{2} \right) = -\sqrt{1 + \sin A} + \sqrt{1 - \sin A}$
  • C
    $2 \sin \left( \frac{A}{2} \right) = -\sqrt{1 + \sin A} - \sqrt{1 - \sin A}$
  • D
    $2 \sin \left( \frac{A}{2} \right) = \sqrt{1 + \sin A} + \sqrt{1 - \sin A}$

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$\cot 5^o - \tan 5^o - 2 \tan 10^o - 4 \tan 20^o - 8 \cot 40^o$ ની કિંમત શોધો.

જો $\tan A = \frac{1}{2}$ અને $\tan B = \frac{1}{3}$ હોય,તો $\tan (A + 2B)$ ની કિંમત શોધો.

જો $2 \cos \theta = x + \frac{1}{x}$ હોય,તો $2 \cos 3 \theta = $

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