Texas Instruments TI-89 사용자 설명서

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Exploring cos(x) = sin(x)
Exploring cos(x) = sin(x)
Exploring cos(x) = sin(x)
Exploring cos(x) = sin(x)
This activity uses two methods to find where 
cos(x) = sin(x)
 for the values of 
x
 between 0 
and 3p.
Method 1: Graph Plot
Method 1: Graph Plot
Method 1: Graph Plot
Method 1: Graph Plot
Perform the following steps to observe where the graphs of the functions 
y1(x)=cos(x)
 
and 
y2(x)=sin(x)
 intersect.
4. Solve for the value of 
x
 that will cause the 
inverse of the matrix to be invalid.
Enter:
solve(getDenom( 
2 ± 
[1,4] )=0,x)
 
Result: 
x= 
L
70/17
Note:
 Use the cursor in the history area to 
scroll the result.
1. In the 
Y= Editor
, set 
y1(x)=cos(x)
 and 
y2(x)=sin(x)
.
2. In the 
Window Editor
, set 
xmin=0
 and 
xmax=3
p.
3. Press 
„ and select 
A:ZoomFit
.