How to Use Trigonometric Functions in GeoGebra
GeoGebra has the built-in functions
tan(<x>) for calculating the sine, the cosine and the tangent of angles.
GeoGebra uses the names
acos(<x>), for the inverse functions and for in the interval , and
atan(<x>) for for any . Use the inverse functions to calculate the angles of a right triangle when you already know two or all the side lengths, by typing the expression directly in
Algebra View or
When you input angles measured in degrees, you have to use the symbol (keyboard shortcut
Note! If you try to insert a value less than or greater than 1,
GeoGebra will return a number containing the letter . This indicates that you have received a complex solution. Unless you know that complex solutions are fine for your problem, this solution indicates that you input something wrong.
Note! In some versions of
GeoGebra, angles in
Algebra View are by default measured in degrees, while angles in
CAS are measured in radians. If you want
CAS to use degrees, use the commands
atand(<x>), which are the regular commands with a
d at the end of the command name.
You can also get the answer in degrees quickly by dividing your answer by or by the string
deg, such as
asin(<x>)/. It may seem strange to divide by , but it works!
Trigonometric Expressions in
Algebra View under
- Type the expression and press