-- returns the hyperbolic cosine of an angle
function cosh(fAng)
	return (exp(fAng) + exp(-fAng)) / 2
end


-- returns the hyperbolic sine of an angle
function sinh(fAng)
	return (exp(fAng) - exp(-fAng)) / 2
end


-- returns the hyperbolic tangent of an angle
function tanh(fAng)
	return (exp(fAng) - exp(-fAng)) / (exp(fAng) + exp(-fAng))
end


-- returns the hyperbolic cosecant of an angle
function csch(fAng)
	return 1 / sinh(fAng)
end


-- returns the hyperbolic secant of an angle
function sech(fAng)
	return 1 / cosh(fAng)
end


-- returns the hyperbolic cotangent of an angle
function coth(fAng)
	return 1 / tanh(fAng)
end


-- returns the cosecant of an angle
function csc(fAng)
	return 1 / sin(fAng)
end


-- returns the secant of an angle
function sec(fAng)
	return 1 / cos(fAng)
end


-- returns the cotangent of an angle
function cot(fAng)
	return 1 / tan(fAng)
end


-- returns the exsecant of an angle
function exsec(fAng)
	return sec(fAng) - 1
end


-- returns the coexsecant of an angle
function coexsec(fAng)
	return csc(fAng) - 1
end


-- returns the versesine of an angle
function vers(fAng)
	return 1 - cos(fAng)
end


-- returns the coversesine of an angle
function covers(fAng)
	return 1 - sin(fAng)
end


-- returns the half-versesine of an angle
function hav(fAng)
	return vers(fAng) / 2
end