\[\sin {{20}^{o}}\,\sin {{40}^{o}}\,\sin {{60}^{o}}\,\sin {{80}^{o}}=\ – McqOptions

MCQOPTIONS

1.	\[\sin {{20}^{o}}\,\sin {{40}^{o}}\,\sin {{60}^{o}}\,\sin {{80}^{o}}=\] [MNR 1976, 81]
A.	\[-3/16\]
B.	\[5/16\]
C.	\[3/16\]
D.	\[-5/16\]
Answer» D. \[-5/16\]

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