Previews 57
2. Display and clear the Y= Editor. Then
define the horizontal component
xt1(t) = v
0
t cos q.
Enter values for v
0
and q.
@8 # , 8 ¸ ¸ 15T p 2
X 60 2 “ d ¸
Type T p 2 X, not T 2 X.
Enter a ¡ symbol by typing either 2“ or
2I2 1. This ensures a number is
interpreted as degrees, regardless of the
angle mode.
3. Define the vertical component
yt1(t) = v
0
tsinqN(g/2)t
2
.
Enter values for v
0
, q, and g.
@¸ 15T p 2 W 60 2 “ d |
c 9.8 e 2 d T Z 2 ¸
4. Display the
Window Editor. Enter Window
variables appropriate for this example.
You can press either D or ¸ to enter a
value and move to the next variable.
Press 8 $ 0 D 3 D .02 D ? 2 D 25
D 5 D ? 2 D 10 D 5
5. Graph the parametric equations to model
the path of the ball.
Press 8 %
6. Select
Trace. Then move the cursor along
the path to find the:
• y value at maximum height.
• t value where the ball hits the ground.
Press … B or A as necessary
Steps and keystrokes Display
xt1(t)=15t…cos(60¡)
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