જો $A + B = \frac{\pi}{4}$ હોય,તો $(1 + \tan A)(1 + \tan B) = $

  • A
    $1$
  • B
    $2$
  • C
    $\infty$
  • D
    $-2$

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જો $\theta$ લઘુકોણ હોય અને $\tan(4\theta - 50^{\circ}) = \cot(50^{\circ} - \theta)$ હોય,તો $\theta$ નું મૂલ્ય અંશમાં કેટલું થાય?

$\cot(7.5^{\circ}) + \tan(67.5^{\circ}) - \cot(67.5^{\circ}) - \tan(7.5^{\circ})$ ની કિંમત શું છે?

$2 \sin ^{2} \theta + 3 \cos ^{2} \theta$ ની ન્યૂનતમ કિંમત કેટલી છે?

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$\frac{\sin 3\theta + \sin 5\theta + \sin 7\theta + \sin 9\theta}{\cos 3\theta + \cos 5\theta + \cos 7\theta + \cos 9\theta} = $

$\frac{\sin 81^\circ + \cos 81^\circ}{\sin 81^\circ - \cos 81^\circ}$ ની કિંમત શોધો.

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