$\cos 1^\circ + \cos 2^\circ + \cos 3^\circ + \dots + \cos 180^\circ = $

  • A
    $0$
  • B
    $1$
  • C
    $-1$
  • D
    $2$

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Similar Questions

$\cos 20^\circ \cos 40^\circ \cos 80^\circ = $

જો $\tan x = \frac{b}{a}$ હોય,તો $\sqrt {\frac{{a + b}}{{a - b}}} + \sqrt {\frac{{a - b}}{{a + b}}} = $

જો $A + B + C = \pi$ અને $\cos A = \cos B \cos C$ હોય,તો $\tan B \tan C$ ની કિંમત શોધો.

$\tan 9^{\circ} - \tan 27^{\circ} - \tan 63^{\circ} + \tan 81^{\circ}$ નું મૂલ્ય શું છે?

જો $\sec \theta - \tan \theta = \frac{1}{\sqrt{3}}$ હોય,તો $\sec \theta \cdot \tan \theta$ ની કિંમત શોધો.

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