The correct option is (d) \[-\mathbf{\pi }/\mathbf{10}\]
The value of \[\mathbf{si}{{\mathbf{n}}^{-\mathbf{1}}}~\mathbf{cos}\text{ }\mathbf{33\pi }/\mathbf{5}\]is (a) \[\mathbf{3\pi }/\mathbf{5}\] (b) \[-\mathbf{7\pi }/\mathbf{5}\] (c) \[\mathbf{\pi }/\mathbf{10}\] (d) \[-\mathbf{\pi }/\mathbf{10}\]
The value of \[\mathbf{si}{{\mathbf{n}}^{-\mathbf{1}}}~\mathbf{cos}\text{ }\mathbf{33\pi }/\mathbf{5}\]is (a) \[\mathbf{3\pi }/\mathbf{5}\] (b) \[-\mathbf{7\pi }/\mathbf{5}\] (c) \[\mathbf{\pi }/\mathbf{10}\] (d) \[-\mathbf{\pi }/\mathbf{10}\]