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If sin (A-B) =1/2,cos(A+B)=1/2,0 degreeB,find A …

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If sin (A-B) =1/2,cos(A+B)=1/2,0 degree<A+B<90 degree, A>B,find A and B.

Posted by Pratik Dhonde 6 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Khushi Keshri 6 years, 3 months ago

Sin(A-B) =sin30 (we know sin30= 1/2) Cos(A+B)=cos60 (we know cos60=1/2) A-B=30 _(1) A+B=60 _(2) now 2A=90 A=45 Put value of A in eq 1 A-B=30 ;B=15

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