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

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

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$\theta$ ના તમામ શક્ય મૂલ્યો માટે $\frac{\sin^2 \theta}{\sin \theta - \cos \theta} - \frac{\sin \theta + \cos \theta}{\tan^2 \theta - 1}$ ની કિંમત:

જો $(\sec A + \tan A)(\sec B + \tan B)(\sec C + \tan C) = (\sec A - \tan A)(\sec B - \tan B)(\sec C - \tan C)$ હોય,તો દરેક બાજુનું મૂલ્ય શું થાય?

આપેલ છે કે $\pi < \alpha < \frac{3\pi}{2},$ તો પદાવલિ $\sqrt{4\sin^4 \alpha + \sin^2 2\alpha} + 4\cos^2 \left( \frac{\pi}{4} - \frac{\alpha}{2} \right)$ ની કિંમત શોધો.

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જો $x \sin \theta = y \sin \left( \theta + \frac{2\pi}{3} \right) = z \sin \left( \theta + \frac{4\pi}{3} \right)$ હોય,તો:

$\sin 15^\circ + \cos 105^\circ = $

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