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If sin (A-B)=1/2 COS (A+B)=1/2 FIND A AND B |
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Answer» Thanks this is very much helpful for me As we know , Value of sin 30°= 1/2 Value of cos 60°= 1/2 Sin(A—B)= sin 30° A—B=30°---------------------------©Cos(A+B)=cos 60° A+B=60°---------------------------®From equation © and ® A+B=60° A–B=30° ______________ 2A= 90° A=45° &. B=45° |
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