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atan(NaN) NaN
atan(+°)
¹/2
atan(-°) -
¹/2
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.
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¡ 2
¹ 400
180¡
¹ 200
90¡
¹/2 100
45¡
¹/4 50
iMalc Manual
Technical Considerations
Technical Considerations
42
Error codes
Trigonometry units