Thread: Need help with the following trig identity.
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Old January 6th, 2009, 03:00 PM
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\frac{\cos(x-y)}{\cos(x)\sin(y)}

using \cos(x-y) = \cos(x)\cos(y)+\sin(x)\sin(y),

\frac{\cos(x)\cos(y)+\sin(x)\sin(y))}{\cos(x)\sin(y)} \Rightarrow \frac{\cos(x)\cos(y)}{\cos(x)\sin(y)} + \frac{\sin(x)\sin(y))}{\cos(x)\sin(y)}

I'm sure you can work out the rest
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