Posted by **xX_Supaman_Xx** on Saturday, December 1, 2007 at 6:08pm.

How does

sin(c+h)=sin(c)xcos(h)+cos(c)xsin(h)

please explain

- Maths-Trig -
**MathGuru**, Tuesday, December 4, 2007 at 9:04am
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?

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