Q: The value of $$ cos {20^o} cos {40^o}cos {60^o}cos {80^o}$$ is: – McqOptions

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1.	Q: The value of $$ cos {20^o} cos {40^o}cos {60^o}cos {80^o}$$ is:
A.	$$ {1\over 15}$$
B.	$$ {1\over 16}$$
C.	$$ {1\over 12}$$
D.	None of these
Answer» C. $$ {1\over 12}$$

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