Introduction to Python: An Example of trigonometric function tan (), pythontan

Introduction to Python: An Example of trigonometric function tan (), pythontan

Description

Tan () returns the sine of x radians.

Syntax

The syntax of the tan () method is as follows:

import mathmath.tan(x)

Note: tan () cannot be accessed directly. You need to import the math module and call this method through the math static object.

Parameters

X -- a value.

Return Value

Returns the sine of x radians. The value ranges from-1 to 1.

Instance

The following example shows how to use the tan () method:

#!/usr/bin/pythonimport mathprint "tan(3) : ", math.tan(3)print "tan(-3) : ", math.tan(-3)print "tan(0) : ", math.tan(0)print "tan(math.pi) : ", math.tan(math.pi)print "tan(math.pi/2) : ", math.tan(math.pi/2)print "tan(math.pi/4) : ", math.tan(math.pi/4)

The output result is as follows:

tan(3) : -0.142546543074tan(-3) : 0.142546543074tan(0) : 0.0tan(math.pi) : -1.22460635382e-16tan(math.pi/2) : 1.63317787284e+16tan(math.pi/4) : 1.0

Summary

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