Texas Instruments TI-83 - Exponents; Caret (); Negative Button

Find the right intersection point:
Press 2
nd
TRACE 5: intersect.
First Curve? Move cursor right closer to the right point of intersection.
Press ENTER .
Second Curve? Press ENTER.
Guess? Press ENTER.
Store right x-coordinate as B:
Press 2
nd
MODE (to QUIT GRAPH screen and view HOME screen).
Press X,T, θ ,n STO  ALPHA B ENTER.
Store left y-coordinate as D:
Press 2
nd
MODE (to QUIT GRAPH screen and view HOME screen).
Press ALPHA Y STO  ALPHA D ENTER.
( ) cos( )
f x x
=
and
2
( ) 3 2
g x x
= −
have points of intersection at approximately
(
)
0.930,0.597
− and
(
)
0.930,0.597
.
Calculate A – B.
A – B ≈ -1.860981941 or A – B ≈ -1.861
NOTE: If you used the rounded values to compute the new problem, you would get
A – B ≈ -1.86…. which is incorrect!
Calculate C + D.
C + D ≈ 1.194880677 or C + D ≈ 1.195
NOTE: If you used the rounded values to compute the new problem, you would get
C + D ≈ 1.194…. which is incorrect!