hp40g+.book Page 16 Friday, December 9, 2005 1:03 AM

DEF command to it. Press to complete the definition.

To calculate the real part of the expression, apply the IM command (available on the COMPLEX submenu of the MATH menu) to the stored variable M.

Press to get the result at the right:

Finally, define the result as Y(t) in the same way that you defined X(t): by firstly adding Y(t) = to the expression (as shown at the

right) and then applying the DEF command.

 

We have now found the coordinates of M in terms of t.

Part 2

To find an axis of symmetry for Γ, calculate x(–t)and

 

y(–t)

by typing:

 

 

 

 

X

 

 

 

 

 

 

 

 

t

 

 

 

Press

to highlight the

 

 

expression.

 

 

 

Then press

to

 

 

 

 

produce the result at the

 

 

right:

 

 

 

 

 

 

 

 

In other words, x(–t) = x(t)

Now type

Y

t

Press to highlight the expression.

16-16

 

 

Step-by-Step Examples