Trigonometry
Arccosine
Inverse cosine, result in degrees.
Formula
Formula
θ = acos(x)
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| x | value in [−1, 1] | real number (ℝ) | — | input |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givenx = 0.5
Result60
Example 2
Givenx = 0
Result90