જો $\operatorname{cosec}^{2} \theta = \frac{4xy}{(x+y)^{2}}$ હોય,તો

  • A
    $x = -y$
  • B
    $x = \frac{1}{y}$
  • C
    $x = y$
  • D
    આમાંથી કોઈ નહીં

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જો $A + B + C = \pi$ $(A, B, C > 0)$ અને ખૂણો $C$ ગુરુકોણ હોય,તો:

$\frac{\tan 70^\circ - \tan 20^\circ}{\tan 50^\circ}$ નું મૂલ્ય શોધો.

$\sin ^{2} 30^{\circ} \cos ^{2} 45^{\circ}+5 \tan ^{2} 30^{\circ}+\frac{3}{2}\sin ^{2} 90^{\circ}-3 \cos ^{2} 90^{\circ}$ ની કિંમત શોધો.

જો $\tan \alpha = \frac{1}{7}$ અને $\tan \beta = \frac{1}{3}$ હોય,તો $\cos 2\alpha = $

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