List of Trignometric Math Functions in PHP.
acos():The "acos" function returns the arc cosine of the number in radians.
acoh():The "acosh" function returns the inverse hyperbolic cosine.
asin():The "asin" function returns the arc sine value for the given number.
asinh():The "asinh" function returns the inverse hyperbolic sine of a number.
atan2():The "atan2" function returns arc tangent of two variables.
atan():The "atan" function returns arc tangent of the variable.
atanh():The "atanh" function returns inverse hyperbolic tangent of the variable.
cos():The "cos" function returns the cosine of a number.
cosh():The "cosh" function returns the hyperbolic cosine of a number.
sin():The "sin" function returns the sine of a number.
sinh():The "sinh" function returns the hyperbolic sine of a number.
tan():The "tan" function returns a number that represents the tangent of an angle.
tanh():The "tanh()" function returns the hyperbolic tangent of an angle.