Trig functions
sin(A + B) = sin A cos B + cos A sin B
cos(A + B) = cos A cos B − sin A sin B
cos(A − B) = cos A cos B + sin A sin B
sin(A − B) = sin A cos B − cos A sin B
Useful sites
https://brownmath.com
sin(A + B) = sin A cos B + cos A sin B
cos(A + B) = cos A cos B − sin A sin B
cos(A − B) = cos A cos B + sin A sin B
sin(A − B) = sin A cos B − cos A sin B
Useful sites
https://brownmath.com
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