# How to Solve Trigonometric Equations in GeoGebra

Here’s how you use `GeoGebra` to solve a trigonometric equation. `GeoGebra` has these trigonometric functions:

• `sin(x)` (sine)

• `asin(x)` (the inverse function of sine)

• `cos(x)` (cosine)

• `acos(x)` (the inverse function of cosine)

• `tan(x)` (tangent)

• `atan(x)` (the inverse function of tangent)

`GeoGebra` Instruction 1

1.
Open `CAS` under  `View` in  `Menu`.
2.
Type the equation. If you click `Solve`  you get the exact answer. If there is no exact answer, `GeoGebra` will not calculate it. In that case, click on the answer you got and press `Numeric Evaluation`  to get the answer as a decimal number.

Note! `CAS` uses ${k}_{1}$ as the name for the arbitrary integer in the solution of a trigonometric equations. In textbooks $n$ and $k$ are also used.