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Mathematics, 28.07.2019 15:30 91miketaylor

Sin(a)+sin(b)=sqrt(5/3) and cos(a)+cos(b)=1. compute cos(a-b). i drew out triangles and modeled the sines and cosines of a and b, but that doesnt me find cos(a-b). what do i do?

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Sin(a)+sin(b)=sqrt(5/3) and cos(a)+cos(b)=1. compute cos(a-b). i drew out triangles and modeled the...

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