HP 50g HP 50g_user's manual_English_HDPSG49AEM8.pdf - Page 72

Function DROITE: equation of a straight line, Reference

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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. Function DROITE: equation of a straight line Function DROITE takes as argument two complex numbers, say, x1 + iy1 and x2+iy2, and returns the equation of the straight line, say, y = a + bx, that contains the points (x1, y1) and (x2, y2). 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. Page 4-7

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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.