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

  • A
    $\frac{1}{2}$
  • B
    $\frac{1}{8}$
  • C
    $\frac{1}{4}$
  • D
    $\frac{1}{16}$

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$\tan A + 2 \tan 2A + 4 \tan 4A + 8 \cot 8A = $

જો $\tan \left(\frac{x}{2}\right) = \frac{m}{n}$ હોય,તો $m \sin (x) + n \cos (x)$ ની કિંમત કેટલી થાય?

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