fx-82MS fx-82TL fx-9860GII TI-83
cos⁻¹
On a Casio calculator you can calculate the inverse cosine
SHIFT cos⁻¹ E
cos
Example 1
To calculate cos⁻¹(1) = 0
SHIFT cos⁻¹ cos 1 = cos⁻¹ 1
0.
Example 2
To calculate cos⁻¹(−1) = π
SHIFT cos⁻¹ cos (−) 1 = cos⁻¹ -1
3.141592654
Example 3
To calculate cos⁻¹(0) = ½π
SHIFT cos⁻¹ cos 0 = cos⁻¹ 0
1.570796327