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

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

$\cot \frac{\pi}{24}$ નું મૂલ્ય શું છે?

જો $\theta$ બીજા ચરણમાં ન હોય અને $\tan \theta = \frac{-3}{4}$ હોય,તો $\tan \frac{\theta}{2} + \sin 2 \theta =$

$\frac{\cot ^2 15^{\circ}-1}{\cot ^2 15^{\circ}+1} = $

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