HP 33s Scientific manual Flags Used, Remarks, Program Instructions

ª     2     !  #$  ! 

Program Lines: (In ALG mode)

  $  ¸8º´θ8T  ! 1   ª 

Description

Calculates the magnitude of the U, V, W vector.

Divides the dot product by the magnitude of the X–,

Y–, Z–vector.

Divides previous result by the magnitude.

Calculates angle.

Displays angle.

Loops back for polar display/input.

Checksum and length: 0548 90

Flags Used:

None.

Remarks:

The terms "polar" and "rectangular," which refer to two–dimensional systems, are used instead of the proper three–dimensional terms of "spherical" and "Cartesian." This stretch of terminology allows the labels to be associated with their function without confusing conflicts. For instance, if LBL C had been associated with Cartesian coordinate input, it would not have been available for cross product.

Program Instructions:

1.Key in the program routines; press ‡when done.

2.If your vector is in rectangular form, press XR and go to step 4. If your vector is in polar form, press XP and continue with step 3.

Mathematics Programs 15–7