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Questions  >>  CBSE XI  >>  Math  >>  Trigonometric Functions
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Q)

The value of $\cos 12^{\large\circ}+\cos 84^{\large\circ}+\cos 156^{\large\circ}+\cos 132^{\large\circ}$ is

$\begin{array}{1 1}(A)\;\large\frac{1}{2}&(B)\;1\\(C)\;\large\frac{-1}{2}&(D)\;\large\frac{1}{8}\end{array} $

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