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Multiple Choice Question
Simplify:
sin7x−sin5xcos7x+cos5x. \frac { \sin 7x - \sin 5x} { \cos 7x + \cos 5x}. cos7x+cos5xsin7x−sin5x.
1) tanx \tan xtanx 2) tan2x \tan 2x tan2x 3) tan6x \tan 6x tan6x 4) tan12x \tan 12x tan12x
[Sorry, they want the multiple choice options to be a whole number, so pick from the above choices.]
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