$1 - 2{\sin ^2}\left( {\frac{\pi }{4} + \theta } \right) = $

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

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Similar Questions

કિંમત શોધો: $\cos^2 48^\circ - \sin^2 12^\circ$

સાબિત કરો કે $\cos \left( \frac{\pi}{4} + x \right) + \cos \left( \frac{\pi}{4} - x \right) = \sqrt{2} \cos x$.

જો $\tan A + \tan B = x$ અને $\cot A + \cot B = y$ હોય,તો $\tan (A + B) =$

જો $A=35^{\circ}, B=15^{\circ}$ અને $C=40^{\circ}$ હોય,તો $\tan A \cdot \tan B+\tan B \cdot \tan C+\tan C \cdot \tan A$ ની કિંમત શોધો.

$\cos 15^\circ - \sin 15^\circ$ નું મૂલ્ય કેટલું થાય?

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