ee.Number.acos

  • The Number.acos() method computes the arccosine of an input number in radians.

  • It returns a Number type.

  • The input value for the arccosine method must be within the domain of [-1, 1].

 Computes the arccosine in radians of the input.

UsageReturns
Number.acos()Number
ArgumentTypeDetails
this: inputNumberThe input value.

Examples

Code Editor (JavaScript)

// The domain of arccosine is [-1,1], inputs outside the domain are invalid.
print('Arccosine of -1', ee.Number(-1).acos());  // 3.141592653 (π)
print('Arccosine of 0', ee.Number(0).acos());  // 1.570796326 (π/2)
print('Arccosine of 1', ee.Number(1).acos());  // 0

Python setup

See the Python Environment page for information on the Python API and using geemap for interactive development.

import ee
import geemap.core as geemap

Colab (Python)

# The domain of arccosine is [-1,1], inputs outside the domain are invalid.
print('Arccosine of -1:', ee.Number(-1).acos().getInfo())  # 3.141592653 (π)
print('Arccosine of 0:', ee.Number(0).acos().getInfo())  # 1.570796326 (π/2)
print('Arccosine of 1:', ee.Number(1).acos().getInfo())  # 0