珀尔 | cos()函数
此函数用于计算 VALUE 或 $_ 的余弦(如果省略 VALUE)。 VALUE 应以弧度表示。
Syntax: cos(VALUE)
Parameters:
VALUE in the form of radians
Returns: Function returns cosine of VALUE.
示例 1:
#!/usr/bin/perl
# Calling cos function
$var = cos(5);
# Printing value of cos(5)
print "cos value of 5 is $var";
输出:
cos value of 5 is 0.283662185463226
示例 2:
#!/usr/bin/perl
# Calling cos function
$var = cos(9);
# Printing value of cos(9)
print "cos value of 9 is $var";
输出:
cos value of 9 is -0.911130261884677