Texas Instruments Titanium TI-89, User Manual

Page: 760 / 977

Activities 757
When converted to rectangular form, the sum
of vectors
i
and
c
equals the resultant vector
r
.
4. 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
.
5. 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