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# Basic Inverse Trigonometric Functions

## Apply inverse trig ratios to determine the measure of unknown angles

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Inverse Trig Functions and Solving Right Triangles

This lesson covers the inverse of the three trigonometric ratios and how to use them to solve right triangles.

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## Basic Inverse Trig Functions: Ladder

Basic Inverse Trigonometric Functions Interactive

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