$\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

જો $x = a \operatorname{cosec}^{n} \theta$ અને $y = b \cot^{n} \theta$ હોય,તો $\theta$ નો લોપ કરતા શું મળે?

જો $A + B + C = \pi$ હોય,તો $\tan^2 \frac{A}{2} + \tan^2 \frac{B}{2} + \tan^2 \frac{C}{2}$ હંમેશા કેટલા થાય?

$\sin 10^\circ + \sin 20^\circ + \sin 30^\circ + ... + \sin 360^\circ$ નું મૂલ્ય શું છે?

નીચેનામાંથી કયા વિધેયોનું મહત્તમ મૂલ્ય એક (unity) છે?

$\cos A + \cos (240^\circ + A) + \cos (240^\circ - A) = $

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