(sinx+siny)=a
(Cosx+cosy)=b
Cos(x+y)=?
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(sinx+siny)=a
(Cosx+cosy)=b
Cos(x+y)=c
(Cosx+cosy)=b
Cos(x+y)=c
juddyhopps7:
Wasn't helpful enough
what is ans
b²-a²/b²+a²
But i have no idea how to get it?
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