9.7 Inverse trigonometric functions
Unit 9 · Trigonometric functions and equations
Ideas in this lesson
Principal values of inverse sine
Use the principal interval from negative pi over two to positive pi over two.
Principal values of inverse cosine
Inverse cosine returns an angle from zero to pi, including both endpoints.
Principal values of inverse tangent
Inverse tangent returns an angle strictly between negative and positive pi over two.
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