ee.Number.cos

    • The Number.cos() method computes the cosine of a number assumed to be in radians.

    • It takes a single numerical input and returns a numerical output.

    • Examples demonstrate calculating the cosine of various angles in both JavaScript and Python.

     Computes the cosine of the input in radians.
    Usage Returns
    Number. cos () Number
    Argument Type Details
    this: input
    		Number The input value.

    Examples

    Code Editor (JavaScript) 

     // Input angle in radians. 
 print 
 ( 
 'Cosine of 0' 
 , 
  
 ee 
 . 
 Number 
 ( 
 0 
 ). 
 cos 
 ()); 
  
 // 1 
 print 
 ( 
 'Cosine of π/2' 
 , 
  
 ee 
 . 
 Number 
 ( 
 Math 
 . 
 PI 
 / 
 2 
 ). 
 cos 
 ()); 
  
 // 0 (nearly) 
 print 
 ( 
 'Cosine of π' 
 , 
  
 ee 
 . 
 Number 
 ( 
 Math 
 . 
 PI 
 ). 
 cos 
 ()); 
  
 // -1 
 // Convert degrees to radians. 
 var 
  
 degrees 
  
 = 
  
 45 
 ; 
 var 
  
 radians 
  
 = 
  
 degrees 
  
 * 
  
 ( 
 Math 
 . 
 PI 
 / 
 180 
 ); 
 print 
 ( 
 'Cosine of 45 degrees' 
 , 
  
 ee 
 . 
 Number 
 ( 
 radians 
 ). 
 cos 
 ()); 
  
 // 0.707106781

    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) 

     import 
  
 math 
 # Input angle in radians. 
 display 
 ( 
 'Cosine of 0:' 
 , 
 ee 
 . 
 Number 
 ( 
 0 
 ) 
 . 
 cos 
 ()) 
 # 1 
 display 
 ( 
 'Cosine of π/2:' 
 , 
 ee 
 . 
 Number 
 ( 
 math 
 . 
 pi 
 / 
 2 
 ) 
 . 
 cos 
 ()) 
 # 0 (nearly) 
 display 
 ( 
 'Cosine of π:' 
 , 
 ee 
 . 
 Number 
 ( 
 math 
 . 
 pi 
 ) 
 . 
 cos 
 ()) 
 # -1 
 # Convert degrees to radians. 
 degrees 
 = 
 45 
 radians 
 = 
 degrees 
 * 
 ( 
 math 
 . 
 pi 
 / 
 180 
 ) 
 # 0.707106781 
 display 
 ( 
 'Cosine of 45 degrees:' 
 , 
 ee 
 . 
 Number 
 ( 
 radians 
 ) 
 . 
 cos 
 ())
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