જો $x + \frac{1}{x} = 2\cos \theta ,$ હોય,તો ${x^3} + \frac{1}{{{x^3}}} = $

  • A
    $\cos 3\theta $
  • B
    $2\cos 3\theta $
  • C
    $\frac{1}{2}\cos 3\theta $
  • D
    $\frac{1}{3}\cos 3\theta $

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$\cot 70^\circ + 4\cos 70^\circ$ નું મૂલ્ય શું છે?

જો $\sin 2\theta + \sin 2\phi = 1/2$ અને $\cos 2\theta + \cos 2\phi = 3/2$ હોય,તો $\cos^2(\theta - \phi) = $

$0^{\circ} < \theta < 90^{\circ}$ માટે નીચેનામાંથી કયો સંબંધ સાચો છે?

$\sin 75^\circ = $

જો $\tan \theta = \frac{a}{b}$ હોય,તો $\frac{{\sin \theta }}{{{{\cos }^8}\theta }} + \frac{{\cos \theta }}{{{{\sin }^8}\theta }} = $

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