Asked by Jacob

tan(tan-1 7.4)=?
Answered by Reiny
obviously 7.4
Answered by Cornelius


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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