5. If sin A =1/2 and cos B =1/2, then A+B =?
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Answer:
Answer is 1/2
Explanation:
Given, Sin A = 1/2 and Cos B = 1/2
We know that ,
Sin ( A + B )
=Sin A Cos B + Cos A Sin B
= 1/2 × 1/2 + 1/2 × 1/2
= 1/4 + 1/4
we take a L.C.M of 4
= 2/4
=1/2
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