$\cos ^4 x$ નું મૂલ્ય શું છે?

  • A
    $\frac{3}{8}+\frac{1}{2} \cos 2 x+\frac{1}{8} \cos 4 x$
  • B
    $\frac{3}{8}-\frac{1}{2} \cos 2 x+\frac{1}{8} \cos 4 x$
  • C
    $\frac{3}{8}-\frac{1}{8} \cos 4 x+\frac{1}{2} \cos 2 x$
  • D
    $\frac{1}{8} \cos 4 x+\frac{1}{2} \cos 2 x-\frac{3}{8}$

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$\frac{\sin 3\theta - \cos 3\theta}{\sin \theta + \cos \theta} + 1 = $

$\sqrt{2} + \sqrt{3} + \sqrt{4} + \sqrt{6}$ ની કિંમત શોધો.

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