Texas Instruments TITANIUM TI-89 - Manual (Page 749)

Activities 749
Method 2: Symbolic Manipulation Method 2: Symbolic Manipulation Method 2: Symbolic Manipulation Method 2: Symbolic Manipulation
Perform the following steps to solve the equation sin(x)=cos(x) with respect to x .
4. Find the intersection point of the two
functions.
Note: Press ‡ and select
5:Intersection .
Respond to the screen prompts to select
the two curves, and the lower and upper
bounds for intersection
A .
5. Note the x and y coordinates. (Repeat
steps 4 and 5 to find the other
intersections.)
1. On the Home screen, enter solve(sin(x)=
cos(x),x) .
The solution for x is where @n1 is any
integer.
2. Using the ceiling( ) and floor( ) functions,
find the ceiling and floor values for the
intersection points as shown.
Note: Move the cursor into the history
area to highlight the last answer. Press
¸ to copy the result of the general
solution.