$\frac{\sin(B + A) + \cos(B - A)}{\sin(B - A) + \cos(B + A)} = $

  • A
    $\frac{\cos B + \sin B}{\cos B - \sin B}$
  • B
    $\frac{\cos A + \sin A}{\cos A - \sin A}$
  • C
    $\frac{\cos A - \sin A}{\cos A + \sin A}$
  • D
    આમાંથી કોઈ નહીં

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

$\tan 70^{\circ} - \tan 20^{\circ} = a \cdot \tan 50^{\circ}$ માં $a$ ની કિંમત શોધો.

$\sin 75^{\circ}$ ની કિંમત શોધો.

જો $\cos \alpha + \cos \beta = \frac{1}{3}$ અને $\sin \alpha + \sin \beta = \frac{1}{4}$ હોય,તો $\cos (\alpha + \beta) = $

ધારો કે $\cos(\alpha+\beta)=-\frac{1}{10}$ અને $\sin(\alpha-\beta)=\frac{3}{8}$ જ્યાં $0 < \alpha < \frac{\pi}{3}$ અને $0 < \beta < \frac{\pi}{4}$. જો $\tan 2\alpha=\frac{3(1-r\sqrt{5})}{\sqrt{11}(s+\sqrt{5})}$, જ્યાં $r, s \in N$, તો $r+s$ ની કિંમત . . . . . . થાય.

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