Texas Instruments TI-83 PLUS - Manual (Page 582)

TI-83 Plus Activities 579
4. Press y /
5 to select 5:Intersect . The graph is displayed. Select
a first curve, second curve, and guess for the intersection toward the
left side of the display. The solution is displayed, and the value of
X at
the intersection, which is the lower limit of the integral, is stored in
Ans and X .
5. Press y 5 to go to the home screen. Press y <
7 and use
Shade( to see the area graphically.
Shade(Y 2 ,Y 1 ,Ans,75)
6. Press y 5 to return to the home screen. Enter the expression to
evaluate the integral for the shaded region.
fnInt(Y 1 –Y 2 ,X,Ans,75)
The area is 325.839962 .