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Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Sin(A-B)=sin30 { ..sin1\2 = 30 } cos (A+B) =cos 90 {since cos 1\2=90} A-B=30.....................1 A+B=90....................2 FROM Eq 1 and 2 we have ; A-B=30 A+B=90

2A=120 A=60 SUBTITUTE THE VALUE OF A IN A-B=30 WE GET ; 60-B=30 -B=30-60 -B=-30 B=30 ANS = A=60 B=30