You can
put this solution on YOUR website! I need to solve the following for x where degrees 0 < x < 2pi for the
a) 3sinx=2cos(2x-1)
On your TI-84,
Press MODE and make sure RADIAN is highlighted
Press Y=
Type so that you see:
\Y1=3sin(X)
\Y2=2cos(2X-1)
Press 2ND
Press TRACE
Press 7
You see this:
Press 2ND
Press TRACE
Press 5
Press ENTER
Press ENTER
Press the right arrow about 4 times to get the cursor near the first point
of intersection on the right of the x-axis
Press ENTER
Read at the bottom the screen
X = .67609059 Ignore the Y value
That's the first solution .67609059
Press 2ND
Press TRACE
Press 5
Press ENTER
Press ENTER
Press the right arrow about 15 times to get the cursor near the 2nd point
of intersection on the right of the x-axis.
Read at the bottom the screen
X = 2.9789026 Ignore the Y value
That's the second solution 2.9789026
---------------------------------
b) sin(cosx)=3cos(x-2)
The second problem is done the same way.
The graph looks like this:
The solutions are
.66718557 and 3.8087782
Edwin
