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1 July, 10:48

Give sin (A+B) = 56/65 and sinA=3/5 Find cosB

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  1. 1 July, 11:03
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    Answer:0.9232

    Step-by-step explanation:

    Sin (A+B) = 56/65 A+B=sin^ (-1) 56/65 A+B=59.5

    SinA=3/5 A=sin^ (-1) 3/5 A=36.9

    Since A+B=59.5 we substitute A=36.9 in the equation

    36.9+B=59.5

    B=59.5-36.9

    B=22.6

    CosB=cos22.6=0.9232
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