 # Simplify Inverse Trigonometric Functions

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Examples, solutions, videos, worksheets, games, and activities to help PreCalculus students learn how about the inverse trigonometric functions.

The Inverse Sine, Cosine, and Tangent Functions
This video provides examples of simplifying expressions with inverse trig functions and trig functions.
Examples of simplifying expressions with inverse trig functions and trig functions.

The inverse trigonometric functions for sine, cosine, and tangent, plus a couple of examples.
Inverse Trigonometric Functions
In a problem where two trig functions are not inverses of each other (also known as "inverse trigonometric functions"),
(1) replace the inverse function with a variable (which represents an angle),
(2) use the definition of the inverse function to draw the angle in the unit circle and identify one coordinate,
(3) find the missing coordinate (use Pythagorean Theorem, for example),
(4) use the coordinates to find the missing value.
How to evaluate expressions like tan(sin-1 (4/5))?

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