$\sin 15^{\circ}$ નું મૂલ્ય શોધો.

  • A
    $\frac{\sqrt{3} - 1}{2\sqrt{2}}$
  • B
    $\frac{\sqrt{3} + 1}{2\sqrt{2}}$
  • C
    $\frac{\sqrt{6} - \sqrt{2}}{4}$
  • D
    $\frac{\sqrt{6} + \sqrt{2}}{4}$

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જો $\tan \left( \frac{\pi }{4} + \theta \right) + \tan \left( \frac{\pi }{4} - \theta \right) = \lambda \sec 2\theta$ હોય,તો $\lambda$ =

$\frac{\tan 80^{\circ}-\tan 10^{\circ}}{\tan 70^{\circ}}$ ની કિંમત શોધો.

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

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

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