Q: If $$ sin(θ+30^0)= {3\over \sqrt { 12} } $$ then find cos2θ : – McqOptions

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1.	Q: If $$ sin(θ+30^0)= {3\over \sqrt { 12} } $$ then find cos2θ :
A.	$$ {1\over 4} $$
B.	$$ {3\over 4} $$
C.	$${\sqrt { 3} \ }\over 2 $$
D.	$$ {1\over 2} $$
Answer» C. $${\sqrt { 3} \ }\over 2 $$

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