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

The value of $\sin\large\frac{\pi}{10}$$\sin\large\frac{13\pi}{10}$ is

$\begin{array}{1 1}(A)\;\large\frac{1}{2}&(B)\;\large\frac{-1}{2}\\(C)\;\large\frac{-1}{4}&(D)\;1\end{array} $

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