PHP cos() Function

The cos() function is predefined PHP function. It is used to return the cosine of a number. It returns a numeric value between -1 and 1, which represents the cosine of the angle.

Syntax:

Parameter	Description	Required/Optional
number	Specify a number	Required

Example 1

<?php
$num=3;
echo "Your number is : ".$num;
echo "<br>"."By using 'cos()' function your number is :".(cos($num));
?>

Output:

Your number is : 3
By using 'cos()' function your number is :-0.98999249660045

Example 2

<?php
$num=(-3);
echo "Your number is : ".$num;
echo "<br>"."By using 'cos()' function your number is :".(cos($num));
?>

Output:

Your number is : -3
By using 'cos()' function your number is :-0.98999249660045

Example 3

<?php
$num=0;
echo "Your number is : ".$num;
echo "<br>"."By using 'cos()' function your number is :".(cos($num));
?>

Output:

Your number is : 0
By using 'cos()' function your number is :1

Example 4

<?php
echo "Your number is : M_PI";
echo "<br>"."By using 'cos()' function your number is :".(cos(M_PI));
?>

Output:

Your number is : M_PI
By using 'cos()' function your number is :-1

Example 5

<?php
$num=2*M_PI;
echo "Your number is 2*M_PI: ".$num;
echo "<br>"."By using 'cos()' function your number is :".(cos(2*M_PI));
?>

Output:

Your number is 2*M_PI: 6.2831853071796
By using 'cos()' function your number is :1

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PHP cos() Function

Syntax:

Example 1

Example 2

Example 3

Example 4

Example 5

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