Texas Instruments TITANIUM TI-89 - Manual (Page 779)

Activities 779
When converted to rectangular form, the sum
of vectors
i and c equals the resultant vector r .
5. Using function p2r , convert vectors i , c ,
and r to rectangular form.
Enter:
p2r(i)
!
i
p2r(c)
!
c
p2r(r)
!
r
Because the vectors are equal, the x-
coordinate of
i + c must equal the x-coordinate
of the resultant vector r . Likewise, the y-
coordinate of i + c must equal the y-coordinate
of resultant vector r .
6. Set up two equations involving vectors i + c
and r .
• Equation 1 sets the x-coordinates
equal to each other.
• Equation 2 sets the y-coordinates
equal.
Store these equations into eq1 and eq2 ,
respectively. Enter:
i[1,1]+c[1,1]=r[1,1]
!
eq1
i[1,2]+c[1,2]=r[1,2]
!
eq2