Excel
=COS(1)
// 0.540302306
=COS(PI())
// -1
PHP
echo cos(1);
// 0.54030230586814
echo cos(M_PI);
// -1
PowerShell
[math]::cos(1)
# 0.54030230586814
[math]::cos([math]::pi)
# -1
Python
import math
print math.cos(1)
# 0.540302305868
print math.cos(math.pi)
# -1.0
Ruby
puts Math::cos(1)
# 0.5403023058681398
puts Math::cos(Math::PI)
# -1.0
SQL
MySQL
SELECT COS(1);
# 0.5403023058681398