Trigonometry

Trigonometry

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roll @pie

Arccosine formulas

\[ \textnormal{arccos}( -x ) = \pi - \textnormal{arccos}( x ) \\~\\ \textnormal{arccos}( x ) = \frac{\pi}{2} - \textnormal{arcsin}( x ) \]

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roll @pie

Arctangent formulas

\[ \textnormal{arctan}(-x) = -\textnormal{arctan}(x) \]

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