*Expansion formulae sin (A ± B) = sin A cos B ± cos A sin B
*Expansion formulae
sin (A ± B) = sin A cos B ± cos A sin B
cos (A ± B) = cos A cos B ± sin A sin B
*Expansion formulae
sin (A ± B) = sin A cos B ± cos A sin B
cos (A ± B) = cos A cos B ± sin A sin B