$\frac{\sin \theta + \sin 3 \theta}{\cos \theta + \cos 3 \theta}$ નું મૂલ્ય શું છે?

  • A
    $\cos 2 \theta$
  • B
    $\cot 2 \theta$
  • C
    $\tan 2 \theta$
  • D
    $\operatorname{cosec} \theta + \sin \theta$

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જો $\sin A + \sin B = C$ અને $\cos A + \cos B = D$ હોય,તો $\sin (A + B)$ ની કિંમત શોધો.

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

$\frac{3 + \cot 76^{\circ} \cot 16^{\circ}}{\cot 76^{\circ} + \cot 16^{\circ}}$ ની કિંમત શોધો.

જો $\cos (A-B)=3/5$ અને $\tan A \tan B=2$ હોય,તો નીચેનામાંથી કયું સાચું છે?

જો $\tan A=\frac{1}{\sqrt{x(x^2+x+1)}}, \tan B=\frac{\sqrt{x}}{\sqrt{x^2+x+1}}$ અને $\tan C=\sqrt{x^{-1}+x^{-2}+x^{-3}}$ હોય,તો:

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