જો $\sec \theta = 1\frac{1}{4}$ હોય,તો $\tan \frac{\theta }{2} = $

  • A
    $\frac{1}{3}$
  • B
    $\frac{3}{4}$
  • C
    $\frac{1}{4}$
  • D
    $\frac{5}{4}$

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$2\cos^2 \theta - 2\sin^2 \theta = 1$,તો $\theta = \dots \dots ^\circ$

$9\tan^2\theta + 4\cot^2\theta$ ની ન્યૂનતમ કિંમત કેટલી છે?

$\sin 36^\circ \sin 72^\circ \sin 108^\circ \sin 144^\circ = $

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