$0 < \theta < 90$ અને $\sec \theta = \operatorname{cosec} 60^\circ$ હોય,તો $2 \cos^2 \theta - 1$ ની કિંમત ........ છે.

  • A
    $3$
  • B
    $1$
  • C
    $\frac{3}{4}$
  • D
    $\frac{1}{2}$

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Similar Questions

$\frac{\cos ^{2} 40^{\circ}+\cos ^{2} 50^{\circ}}{\sin ^{2} 40^{\circ}+\sin ^{2} 50^{\circ}}=\ldots \ldots \ldots \ldots$

$\sin^{2} 15^{\circ} + \sin^{2} 75^{\circ} = \dots$

જો $\sin ^{2}(3 x+30^{\circ})+\cos ^{2}(2 x+45^{\circ})=1$ હોય,તો $x = \dots$ ($^{\circ}$ માં)

જો $A = 30^{\circ}$ હોય,તો $\cos 2A$ ની કિંમત $\ldots \ldots \ldots$ થાય.

$\tan \theta + \cot \theta = \ldots \ldots \ldots$

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