acos  (class=math #args=1) Inverse trigonometric cosine.
acosh  (class=math #args=1) Inverse hyperbolic cosine.
cos  (class=math #args=1) Trigonometric cosine.
cosh  (class=math #args=1) Hyperbolic cosine.
asin  (class=math #args=1) Inverse trigonometric sine.
asinh  (class=math #args=1) Inverse hyperbolic sine.
sin  (class=math #args=1) Trigonometric sine.
sinh  (class=math #args=1) Hyperbolic sine.
