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These formulas explain how to add and subtract trigonometric functions (and their arguments). If you've got sum time, see what a difference these formulas will make for your trig toolkit.

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If \( \tan \theta = t \), which of the following is equal to \( \tan 2 \theta \)?

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If \( \tan \theta = t \), which of the following is equal to \( \cos 2 \theta \)?

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