HP 33s Scientific Coordinate Conversions, C–7, θ/ ), 8´θ8T, T/) , Displays θ, Calculates, ALG: Summary C–7, Sets Degrees mode, 30 [5 {r 8´θ8T, Sets Degrees mode

You can press —or ˜(or and ) to review the entire contents of the stack and recall them.

However, in normal operation in ALG mode, the stack in ALG mode differs from the one in RPN mode. (Because when you press ‘, the result is not placed into X1, X2 etc.) Only after evaluating equations, programs, or integrating equations, the values of the four registers will be the same as in RPN mode.

Coordinate Conversions

To convert between rectangular and polar coordinates:

1.Enter the coordinates (in rectangular or polar form) that you want to convert. In ALG mode, the order is y [x or θ [r.

2.Execute the conversion you want: press {r(rectangular–to–polar) or s(polar–to–rectangular). The converted coordinates occupy the X– and Y–registers.

3.The resulting display (the X–register) shows either r (polar result) or x (rectangular result). Press što see θ or y.

Example:

If x = 5, y = 30, what are r, θ ?

Keys:	Display:	Description:
Ÿ{}		Sets Degrees mode.
30 [5 {r 8´θ8T		Calculates hypotenuse (r).
	T/)
š	8´θ8T	Displays θ.
	θ/)

If r = 25, θ = 56, what are x, y ?

Keys:	Display:	Description:
Ÿ{}		Sets Degrees mode.
56 [25 s  8´¸8º		Calculates x.
	%/)

ALG: Summary C–7