A) \[\frac{1}{2}\]
B) \[1\]
C) \[\frac{1}{3}\]
D) \[\frac{3}{2}\]
Correct Answer: A
Solution :
As, \[\cos A\cos B+\sin A\sin B=\cos (A-B)\] \[=\cos \left( \frac{\pi }{3} \right)=\frac{1}{2}\left( \therefore A-B=\frac{\pi }{3} \right)\]You need to login to perform this action.
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