hp40g+.book Page 20 Friday, December 9, 2005 1:03 AM
The example at the right shows the case for t = 0. Select the entire expression
and press 
to get the answer:
0
The example at the right shows the case for t = π/3.
Selecting the entire expression and pressing 
displays the message shown at the right. Accept YES and press 
.
Press 
again to get the result:
∞
The next example is for t = 2π/3. Selecting the entire expression and pressing 
displays the result:
0
The final example is for the case where t = π. Press 
, accept YES to the message UNSIGNED INF.
SOLVE?, press 
and
press 
to get the result:
∞
Here, then, are the variations of x(t) and y(t) :
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