જો $\cot \frac{2x}{3} + \tan \frac{x}{3} = \operatorname{cosec} \frac{kx}{3}$ હોય, તો $k$ ની કિંમત શોધો.

  • A
    $1$
  • B
    $2$
  • C
    $3$
  • D
    $-1$

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જો $\sin \theta = -\frac{4}{5}$ અને $\theta$ ત્રીજા ચરણમાં હોય,તો $\cos \frac{\theta}{2} = $

$\cos 15^{\circ} \cos 7.5^{\circ} \sin 7.5^{\circ}$ નું મૂલ્ય શું છે?

જો $\sin(x+3\alpha) + 3\sin(x-\alpha) = 0$ હોય,તો

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