જો $A + B + C = 180^o$ હોય,તો $\cot \frac{A}{2} + \cot \frac{B}{2} + \cot \frac{C}{2}$ નું મૂલ્ય કેટલું થાય?

  • A
    $\cot \frac{A}{2} \cot \frac{B}{2} \cot \frac{C}{2}$
  • B
    $2 \cot \frac{A}{2} \cot \frac{B}{2} \cot \frac{C}{2}$
  • C
    $4 \cot \frac{A}{2} \cot \frac{B}{2} \cot \frac{C}{2}$
  • D
    $8 \cot \frac{A}{2} \cot \frac{B}{2} \cot \frac{C}{2}$

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જો $\sin \alpha = \frac{2pq}{p^2 + q^2}$ હોય,તો $\sec \alpha - \tan \alpha = $

જો $A + B + C = \frac{3\pi}{2}$ હોય,તો $\cos 2A + \cos 2B + \cos 2C = $

$\tan 20^{\circ} + \tan 40^{\circ} + \tan 60^{\circ} + \cdots + \tan 180^{\circ}$ નું મૂલ્ય કેટલું છે?

જો $\theta$ પ્રથમ ચરણમાં હોય અને $\tan \theta = \frac{3}{4}$ હોય,તો $\frac{\tan \left(\frac{\pi}{2}-\theta\right)-\sin (\pi-\theta)}{\sin \left(\frac{3 \pi}{2}+\theta\right)-\cot (2 \pi-\theta)} = $

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