Write cos3x+cos4x as a product of trigonometric functions?

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- November 13th 2012, 03:03 PMderek1008How do you write equations as a product of trig functions?
Write cos3x+cos4x as a product of trigonometric functions?

- November 13th 2012, 05:44 PMskeeterRe: How do you write equations as a product of trig functions?