fx-82MS fx-82TL fx-9860GII TI-83
cos⁻¹
On a Casio calculator you can calculate the inverse cosine
cos⁻¹ E SHIFT cos
or via the CATALOG as
CATALOG P INPUT SHIFT 4 cos⁻¹ F1
Example 1
To calculate cos⁻¹(1) = 0° in degrees
cos⁻¹ E SHIFT cos cos⁻¹ 1 EXE cos⁻¹ 1 0
Example 2
To calculate cos⁻¹(-1) = π in radians
cos⁻¹ E SHIFT cos (–) 1 EXE cos⁻¹ -1 π
Example 3
To calculate cos⁻¹(0) = ½π in radians
cos⁻¹ E SHIFT cos 0 EXE cos⁻¹ 0
