How to ans this question????
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here ,we have use some basic identities
firstly we have to break by using (a + b)² = a² + b² + 2ab and then, use (sin²x + cos²x) = 1
after simplify we get RHS .
firstly we have to break by using (a + b)² = a² + b² + 2ab and then, use (sin²x + cos²x) = 1
after simplify we get RHS .
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