જો $\sin \theta + \sin 5 \theta = \sin 3 \theta$ અને $0 < \theta < \frac{\pi}{2}$ હોય,તો $\theta$ નું મૂલ્ય (ડિગ્રીમાં) શું છે?

  • A
    $30$
  • B
    $45$
  • C
    $60$
  • D
    $75$

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જો $\cos(\alpha + \beta) = \frac{3}{5}$,$\sin(\alpha - \beta) = \frac{5}{13}$ અને $0 < \alpha, \beta < \frac{\pi}{4}$ હોય,તો $\tan(2\alpha)$ ની કિંમત શોધો.

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

જો $\sin \theta + \cos \theta = x$ હોય,તો ${\sin ^6}\theta + {\cos ^6}\theta = \frac{1}{4}[4 - 3{({x^2} - 1)^2}]$ માટે

$\cos y \cos \left( \frac{\pi}{2} - x \right) - \cos \left( \frac{\pi}{2} - y \right) \cos x + \sin y \cos \left( \frac{\pi}{2} - x \right) + \cos x \sin \left( \frac{\pi}{2} - y \right)$ ની કિંમત શૂન્ય થાય,જો

નીચેના પદનું મૂલ્ય $3(\sin^{4} \theta + \cos^{4} \theta) + 2(\sin^{6} \theta + \cos^{6} \theta) + 12\sin^{2} \theta \cos^{2} \theta$ શોધો.

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