Technical Considerations
42
Technical Considerations
atan(NaN) NaN
atan(+°) ¹/2
Error codes
You may occasionally see some error codes whilst using iMalc. You will get the warning 'imaginary' if you try to take the square root of a negative number. You will also see NAN, often followed by a number in brackets, or INF.
INF means infinity, and can be obtained through erroneous operators such as division by zero.
NANs are Not A Number and are other error codes, generally for numbers which are out of range, such as trying to take the arcsine of 100. The numbers in brackets sometimes following NANs are specific error codes and are listed on page 37.
Trigonometry units
Most computers calculate trig functions such as sine, cosine, tangent and their inverses in radians. iMalc will calculate the correct function in whatever units are shown in the trig mode indicator.
Degrees | Radians | Gradients |
360¡ | 2¹ | 400 |
180¡ | ¹ | 200 |
90¡ | ¹/2 | 100 |
45¡ | ¹/4 | 50 |
iMalc Manual