Yagutkina

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Answer:

sin(A-B)=sin30` {because sin30` value is 1/2} both sin's get cancelled and [A-B=30`]----1 cos(A+B)=cos60` {because cos60` value is 1/2} BOTH cos's get cancelled and [A+B=60]----2 add 1 and 2 equations we get A=45` substitute A=45` in eq. 1 we get B=15` therefore A=45 B=15

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