MathsTrig
posted by xX_Supaman_Xx on .
How does
sin(c+h)=sin(c)xcos(h)+cos(c)xsin(h)
please explain

What you have here is the sum of two angles, which is:
sin(c+h) = sin(c)cos(h) + cos(c)sin(h)
I'm not sure where the "x" comes into play with your equation, is it supposed to be a variable or a multiplier?