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Note: These graphs confirm the domains and ranges given above for the inverse trigonometric functions.
Evaluating Inverse Trigonometric Functions Exactly
You can calculate the exact value for some inverse trigonometric functions. The secret to these problems is recognizing the trigonometric values of the special angles: 30, 45, and 60 degrees. Here are some examples.
Approximating Inverse Trigonometric Functions
You can use a calculator to approximate inverse trigonometric functions. For example...
You can also approximate inverse trigonometric functions graphically (similar to the demonstration in lesson 3).
Click here for some interactive practice with sine.
Click here for some interactive practice with cosine.