જો $\cos \theta = \frac{1}{2}\left( x + \frac{1}{x} \right)$ હોય,તો $\frac{1}{2}\left( x^2 + \frac{1}{x^2} \right) = $

  • A
    $\sin 2\theta $
  • B
    $\cos 2\theta $
  • C
    $\tan 2\theta $
  • D
    $\sec 2\theta $

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Similar Questions

જો $\sin \alpha = \frac{8}{17}, 0 < \alpha < 90^{\circ}$ અને $\tan \beta = \frac{5}{12}, 0 < \beta < 90^{\circ}$ હોય,તો $\cos (\alpha - \beta)$ ની કિંમત શોધો.

જો $\cos (\alpha + \beta ) = \frac{4}{5}, \sin (\alpha - \beta ) = \frac{5}{13}$ અને $\alpha, \beta$ એ $0$ અને $\frac{\pi}{4}$ ની વચ્ચે હોય,તો $\tan 2\alpha = $

જો $a \cos \theta + b \sin \theta = m$ અને $a \sin \theta - b \cos \theta = n$ હોય,તો ${a^2} + {b^2} = $

જો $\tan \alpha = (1 + 2^{-x})^{-1}$ અને $\tan \beta = (1 + 2^{x+1})^{-1}$ હોય, તો $\alpha + \beta$ ની કિંમત શોધો:

જો $5 \tan \theta = 4$ હોય,તો $\frac{5 \sin \theta - 3 \cos \theta}{5 \sin \theta + 2 \cos \theta} = $

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