请帮我把下面的文字翻译成English:

请帮我把下面的文字翻译成English:
二、 三角函数及其他一些基本函数运算
 abs( )：绝对值函数,如abs(-1)=1
 acos( )：反余弦函数,如acos(0.5)=60
 ainv( )：反渐开线函数,如ainv(0.0149043838673)=20
 asin( )：反正弦函数,如sin(30)=0.5
 atan( )：反正切函数,如atan(1)=45
 ceil( )：求不小于给定数的最小整数,如：ceil(1.1)=2,ceil(1.9)=2
 cos( )：余弦函数,如cos(60)=0.5
 ee：常数=2.7182818284590452354
 floor( )：求不大于给定数的最大整数,如：floor(1.1)=1,floor(1.9)=1
 inv( )：渐开线函数,如：inv(20)=0.0149043838673
 ln( )：以自然数e为底的对数,如：ln(ee)=1
 log( )：以10为底的对数,如：log(10)=1
 pi：常数=3.14159265358979323846
在三角函数中使用到 pi 时需注意,如：cos(pi/3) , 我们想它应该等于 cos60=0.5 ,但在计算不求人里不是这样的,cos(pi/3)=0.9998329794591,在三角函数里 pi 并不代表 180 度,pi 在计算不求人里面只纯粹的代表圆周率这个常数；如果需要pi代表角度,需要用tod(pi)把它转换为角度180
 sin( )：正弦函数,如：sin(30)=0.5
 tan( )：正切函数,如：tan(45)=1
 tod( )：弧度转换为角度,如：tod(pi)=180
 toint( )：四舍五入取整,如：toint(1.1)=1,toint(1.9)=2
 torad( )：角度转换为弧度,如：torad(180)=3.14159265358979

Second,and other basic trigonometric function algorithm
 abs () function,such as:the absolute value of abs (-1) = 1
 acos () function,such as:the arccosine acos (0.5) = 60
 ainv () function,such as:the involute ainv 0.0149043838673 (= 20)
 asin () :the arcsine function,such as library functions like sin (30) = 0.5
 atan () function,such as:anti-tangent atan (1) = 45
 ceil (less than) :please give the smallest integer constant,such as:the ceil (1.1) = 2,ceil (1.9) = 2
 cos () function,such as:the cosine cos (60) = 0.5
 ee:2.7182818284590452354 = constant
 floor () :please don't give the biggest integer greater destiny,such as:the floor (1.1) = 1,floor (1.9) = 1
 inv () function,such as:the involute inv (20) = 0.0149043838673
 ln () :for the logarithm of natural e,such as:ln (ee) = 1
 log (10) :for the bottom of the logarithm,such as:log (10) = 1
 PI:3.14159265358979323846 = constant
In the triangle function to PI needing attention,such as:cos (PI / 3),we want it should equal cos60 = 0.5,but not in the calculation of not ask,cos (PI / 3) = 0.9998329794591 trigonometric function,in the PI PI doesn't mean 180 degrees,not only in the calculation of pure representatives cannot inside this constant PI,If need to use,PI representative Tod (PI) converting it into Angle 180
 library functions like sin () function,such as:the sinusoidal library functions like sin (30) = 0.5
 tan () function,such as:the tangent:tan (45) = 1
 Tod () :radian,such as:converting Angle Tod (PI) = 1.8
 toint () :rounding integer,such as:toint (1.1) = 1,toint (1.9) = 2
 torad () :converting Angle,such as:torad radian (180) = 3.14159265358979