જો $x + y = 3 - \cos 4\theta$ અને $x - y = 4 \sin 2\theta$ હોય,તો:

  • A
    $x^4 + y^4 = 9$
  • B
    $\sqrt{x} + \sqrt{y} = 16$
  • C
    $x^3 + y^3 = 2(x^2 + y^2)$
  • D
    $\sqrt{x} + \sqrt{y} = 2$

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જો $\sin^2 \theta = \frac{x^2 + y^2 + 1}{2x}$ હોય,તો $x$ શું હોવું જોઈએ?

જો $0 < x < \pi$ અને $\cos x + \sin x = \frac{1}{2}$ હોય,તો $\tan x$ ની કિંમત શોધો.

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$1 + \cos 2x + \cos 4x + \cos 6x = $

$\frac{{\sqrt 2 - \sin \alpha - \cos \alpha }}{{\sin \alpha - \cos \alpha }} = $

$\frac{1}{4} \tan \frac{\pi}{8} + \frac{1}{8} \tan \frac{\pi}{16} + \frac{1}{16} \tan \frac{\pi}{32} + \dots \infty$ પદોનું મૂલ્ય કેટલું થાય?

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