acos(), angles in degrees
acosh(), angles in radians
asin(), angles in degrees
asinh(), angles in radians
atan(), angles in degrees
atanh(), angles in radians
cos(), angles in degrees
cosh(), angles in radians
e to the something
10 to the something
log base e
log base 10
sin(), angles in degrees
sinh(), angles in radians
tan(), angles in degrees
tanh(), angles in radians
See also: vips_math().