What are the Basic Inverse Trigonometric Functions?

1 Answer
Callum S.
Feb 2, 2015

The basic inverse trigonometric functions are used to find the missing angles in right triangles. While the regular trigonometric functions are used to determine the missing sides of right angled triangles, using the following formulae:

sin theta = opposite dividehypotenuse
cos theta = adjacent divide hypotenuse
tan theta = opposite divide adjacent

the inverse trigonometric functions are used to find the missing angles, and can be used in the following way:

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For example, to find angle A, the equation used is:

cos^-1 = side b divide side c

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