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posted by Jacob on Tuesday, November 15, 2011 at 10:38pm.

tan(tan-1 7.4)=?

obviously 7.4

By definition tan(tan−1(7.4))=7.4 More explicitly: Let α=tan−1(7.4) Then by definition α is the unique angle such that tanα=7.4 and −π2<α<π2.

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