Evaluate: \(tan (tan^{–1} (–4))\).

1.	Evaluate: \(tan (tan^{–1} (–4))\).
Answer» \(tan(tan^{-1}(-4))=-4\) \([\because\,tan(tan^{-1}x)=x\,if\,x\in R\,and\,-4\in R]\)

Answer»

\(tan(tan^{-1}(-4))=-4\)

\([\because\,tan(tan^{-1}x)=x\,if\,x\in R\,and\,-4\in R]\)

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