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