# trig

Graph the following from X = 0 to x = 2 pi
2cos 6x cos4x + 2 sin 6x sin 4x

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1. You can only graph "equations" that are written in the form y = ... or f(x) = ....

are you graphing y = 2cos 6x cos4x + 2 sin 6x sin 4x ?

this reduces to y = 2cos(6x-4x)
y = 2cos 2x

If you are studying this topic you should be able to sketch this one quite readily.

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posted by Reiny

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