જો $\sin x + \cos x = \frac{1}{5}$ હોય,તો $\tan 2x$ ની કિંમત શોધો.

  • A
    $\frac{25}{17}$
  • B
    $\frac{7}{25}$
  • C
    $\frac{25}{7}$
  • D
    $\frac{24}{7}$

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જો $x \in \left(0, \frac{\pi}{2}\right)$ અને $x$ એ સમીકરણ $\sin x \cos x = \frac{1}{4}$ નું સમાધાન કરતું હોય,તો $x$ ની કિંમતો શોધો.

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

$2\cos x - \cos 3x - \cos 5x = $

$\frac{1 + \sin A - \cos A}{1 + \sin A + \cos A} = $

સાબિત કરો કે: $\cos 4x = 1 - 8 \sin^2 x \cos^2 x$

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