$cosec^2 \theta = \frac{4xy}{(x + y)^2}$ ત્યારે જ સાચું છે જો

  • A
    $x + y \neq 0$
  • B
    $x = y, x \neq 0$
  • C
    $x = y$
  • D
    $x \neq 0, y \neq 0$

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$\tan 9^{\circ} - \tan 27^{\circ} - \tan 63^{\circ} + \tan 81^{\circ}$ નું મૂલ્ય શું છે?

જો $\cos \alpha = \frac{2 \cos \beta - 1}{2 - \cos \beta}$ હોય,તો $\tan \frac{\alpha}{2} \cot \frac{\beta}{2}$ ની કિંમત શોધો,જ્યાં $(0 < \alpha < \pi$ અને $0 < \beta < \pi)$.

જો $\tan \theta = \frac{x \sin \phi}{1 - x \cos \phi}$ અને $\tan \phi = \frac{y \sin \theta}{1 - y \cos \theta}$ હોય,તો $\frac{x}{y} = $

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જો $A = 133^\circ$ હોય,તો $2\cos \frac{A}{2}$ ની કિંમત કેટલી થાય?

$\sqrt {2 + \sqrt {2 + 2\cos 4\theta } } = $

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