Evaluate $\tan^{-1}(0.85)$. Give the answer to 3 significant figures, or to 1 decimal place for an

Question

Evaluate $\tan^{-1}(0.85)$. Give the answer to 3 significant figures, or to 1 decimal place for an angle. Give non-exact lengths and areas to 3 significant figures, and angles to 1 decimal place.

Accepted Answer

$\tan^{-1}(0.85)=40.364536\ldots^\circ=40.4^\circ$.

Calculator evaluation of trigonometric expressions

Calculator evaluation of trigonometric expressions

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