' arc sine' error if value is outside the range [-1,1]Function ASin(value As Double) As Double If Abs(value) <> 1 Then ASin = Atn(value / Sqr(1 - value * value)) Else ASin = 1.5707963267949 * Sgn(value) End IfEnd Function' arc cosine' error if NUMBER is outside the range [-1,1]Function ACos(ByVal number As Double) As Double If Abs(number) <> 1 Then ACos = 1.5707963267949 - Atn(number / Sqr(1 - number * number)) ElseIf number = -1 Then ACos = 3.14159265358979 End If 'elseif number=1 --> Acos=0 (implicit)End Function' arc cotangent' error if NUMBER is zeroFunction ACot(value As Double) As Double ACot = Atn(1 / value)End Function' arc secant' error if value is inside the range [-1,1]Function ASec(value As Double) As Double ' NOTE: the following lines can be replaced by a single call ' ASec = ACos(1 / value) If Abs(value) <> 1 Then ASec = 1.5707963267949 - Atn((1 / value) / Sqr(1 - 1 / (value * value))) Else ASec = 3.14159265358979 * Sgn(value) End IfEnd Function' arc cosecant' error if value is inside the range [-1,1]Function ACsc(value As Double) As Double ' NOTE: the following lines can be replaced by a single call ' ACsc = ASin(1 / value) If Abs(value) <> 1 Then ACsc = Atn((1 / value) / Sqr(1 - 1 / (value * value))) Else ACsc = 1.5707963267949 * Sgn(value) End IfEnd Function
What We Should Expect from Cell Phone Tech in the Near Future
May 31, 2023
The earliest cell phones included boxy designs full of buttons and antennas, and they only made calls. Needless to say, we’ve come a long way from those classic brick phones
