Page 4-7
Function DROITE: equation of a straight line
Function DROITE takes as argument two complex numbers, say, x
1
+ iy
1
and x
2
+iy
2
, and returns the equation of the straight line, say, y = a + bx,
that contains the points (x
1
, y
1
) and (x
2
, y
2
). For example, the line
between points A(5, -3) and B(6, 2) can be found as follows (example in
Algebraic mode):
Function DROITE is found in the command catalog (‚N). If the
calculator is in APPROX mode, the result will be Y = 5.*(X-5.)-3.
Reference
Additional information on complex number operations is presented in
Chapter 4 of the calculator’s user’s guide.
NOTE: When using trigonometric functions and their inverses with
complex numbers the arguments are no longer angles. Therefore, the
angular measure selected for the calculator has no bearing in the
calculation of these functions with complex arguments.
SG49A.book Page 7 Friday, September 16, 2005 1:31 PM
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