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How do you evaluate $tan ({tan}^{- 1} (- 1))$ $tan(tan^-1(-1))$ ?

1 Answer

Feb 25, 2017

$- 1$ $-1$

Explanation:

$tan ({tan}^{- 1} (- 1))$ $tan(tan^-1(-1))$

$:.=tan(arc tan(-1)$

$:.=tan(-45)$

$:.=-1$

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