Python radians() Function

Python 数字Python Numbers

Description

radians()The method converts an angle to radians.

Syntax

The following is the syntax of the radians() method:

The relationship between angles and radians is: 2π radians = 360°. Thus 1° ≈ 0.0174533 radians, and 1 radian ≈ 57.29578°.

  • 1) Formula for converting angles to radians: radians = degrees ÷ 180 × π
  • 2) Formula for converting radians to angles: degrees = radians × 180 ÷ π
import math

math.radians(x)

Note:radians() cannot be accessed directly; you need to import the math module and then call this method through the math static object.

Parameters

  • x -- an angle value, with the default unit being degrees°。

Return Value

Returns the radian value of an angle.

Example

The following shows an example of using the radians() method:

Example

#!/usr/bin/python
import math

print "radians(90) : ",  math.radians(90)
print "radians(45) : ",  math.radians(45)
print "radians(30) : ",  math.radians(30)

After running the above example, the output result is:

radians(90) :  1.57079632679
radians(45) :  0.785398163397
radians(30) :  0.523598775598

Python 数字Python Numbers

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