Atn 

ֵķֵ

Atn(number)

number Чֵʽ

˵
Atn ֱߵıֵ (number) ضӦǵĻֵ˱ֵǸýǶԱߵĳڱ֮߳ȡķΧǴ -pi/2  pi/2 ȡ

ȱ任ΪǶȵķǽȳ pi/180֮Ƕȱ任ΪȵķǽǶȳ180/pi 

ʾ Atn  pi ֵ: 

Dim pi
pi = 4 * Atn(1)   '  pi ֵ
ע   Atn  TanΪֱߵıֵķǺҪ Atn Уеĵ (1/tangent)
Ҫ
汾1
