【實用書籍app】Trigonometry Reference Pro|最夯免費app

Need to refresh their knowledge of geometry, or prepare for an exam?

This app is for you!

Use this great reference guide that every student should have.

Includes definitions and formulas:

Radian measurement of angles.

Basic trigonometric functions.

Functions of a single angle.

Addition and subtraction.

Sum-to-product.

Product-to-sum.

Triangle.

Inverse functions.

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