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Usage examples:

arcsin(sin(23))
Sinus:
sin(23)
Cosinus:
cos(23)
Tangens:
tan(23)
Arcussinus
asin(0.23); arcsin(0.23)
Arcuscosinus
acos(0.23); arccos(0.23)
atan(0.23)
Sinus Hyperbolicus:
sinh(23)
Arcussinus Hyperbolicus:
cosh(23)
Arcuscosinus Hyperbolicus:
asinh(23)
acosh(23)
Pi
pi
radians:
:rad
sin( pi/4 )
degrees:
:deg
sin( 45 )

See also:

acos acosh asin asinh atan atan2 cos cosh deg pi rad sin sinh tan tanh