જો $7 \sin ^{2} \theta+3 \cos ^{2} \theta=4$ હોય,તો $\tan \theta=$

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

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

જો $A + B + C = \pi ,$ હોય તો $\cos \, 2A + \cos \, 2B + \cos \, 2C = $

સમીકરણ $\cot x - \cos x = 1 - \cot x \cos x$ નું સમાધાન કરતા $x \in [0, 2\pi]$ ના મૂલ્યોની સંખ્યા શોધો.

જો $\sin 2\theta + \sin 2\phi = 1/2$ અને $\cos 2\theta + \cos 2\phi = 3/2$ હોય,તો $\cos^2(\theta - \phi) = $

જો $\sin A + \cos A = \sqrt{2}$ હોય,તો $\cos^2 A = $

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