=head1 SYNOPSIS
use Math::Trig;
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$x = tan(0.9);
$y = acos(3.7);
$z = asin(2.4);
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$halfpi = pi/2;
$rad = deg2rad(120);
details like for example how to display complex numbers. For example:
print asin(2), "\n";
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should produce something like this (take or leave few last decimals):
1.5707963267949-1.31695789692482i
$radians = deg2rad($degrees);
$radians = grad2rad($gradians);
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$degrees = rad2deg($radians);
$degrees = grad2deg($gradians);
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$gradians = deg2grad($degrees);
$gradians = rad2grad($radians);