If \[x=\cos 10{}^\circ \cos 20{}^\circ \cos 40{}^\circ ,\]then the value of \[x\] is [Roorkee 1995]

\[\frac{1}{8}\text{cosec}10{}^\circ \]

\[\frac{1}{4}\tan 10{}^\circ \]

\[\frac{1}{8}\cot 10{}^\circ \]

\[\frac{1}{8}\sec 10{}^\circ \]

If \[x=\cos 10{}^\circ \cos 20{}^\circ \cos 40{}^\circ ,\]then the val

1.	If \[x=\cos 10{}^\circ \cos 20{}^\circ \cos 40{}^\circ ,\]then the value of \[x\] is [Roorkee 1995]
A.	\[\frac{1}{4}\tan 10{}^\circ \]
B.	\[\frac{1}{8}\cot 10{}^\circ \]
C.	\[\frac{1}{8}\text{cosec}10{}^\circ \]
D.	\[\frac{1}{8}\sec 10{}^\circ \]
Answer» C. \[\frac{1}{8}\text{cosec}10{}^\circ \]

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If \[x=\cos 10{}^\circ \cos 20{}^\circ \cos 40{}^\circ ,\]then the value of \[x\] is [Roorkee 1995]

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