$\cos ^2\left(\frac{7 \pi}{8}\right)+\cos ^2\left(\frac{5 \pi}{8}\right)+\cos ^2\left(\frac{3 \pi}{8}\right)+\cos ^2\left(\frac{\pi}{8}\right)=$

  • A
    $\frac{3}{2}$
  • B
    $\frac{2}{3}$
  • C
    $2$
  • D
    $1$

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Similar Questions

$(\sin 210^{\circ})(\sin 585^{\circ})$ નું મૂલ્ય શું છે?

જો $\theta$ ત્રીજા ચરણમાં હોય અને $\cos \theta = -\frac{3}{5}$ હોય,તો $\tan \theta$ ની કિંમત શોધો.

$\cos 1200^{\circ} + \tan 1485^{\circ}$ ની કિંમત શોધો.

$\tan A = \frac{-60}{11}$ અને $A$ એ $4^{\text{th}}$ ચરણમાં નથી. $\sec B = \frac{41}{9}$ અને $B$ એ $1^{\text{st}}$ ચરણમાં નથી. જો $\operatorname{cosec} A + \cot B = K$ હોય,તો $24K =$

$\tan 1^\circ \tan 2^\circ \tan 3^\circ \tan 4^\circ \dots \tan 89^\circ = $

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