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Mathematics
Adonis Dalton
28 November, 13:35
Give sin (A+B) = 56/65 and sinA=3/5 Find cosB
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Scout
28 November, 16:55
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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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