The equation cos(x) = 0.3x has three solutions.
Find their values correct to two decimal places
Make sure your TI-83 or 84 is in RADIAN mode:
Press CLEAR
Press MODE
Scroll down to RADIAN
Press ENTER
Press 2nd
Press MODE (QUIT)
Press Y=
beside \Y1= type cos(X)
beside \Y2= type .3X
Press ZOOM
Press 7
Press 2nd
Press TRACE (CALC)
Press 5
Press ENTER
Press ENTER
Press ENTER
Read the X-value:
X = 1.2019132
That's one solution
Press TRACE (CALC)
Press 5
Press ENTER
Press ENTER
Press the left arrow key 20 times
Press ENTER
Read the X-value:
X = -2.355585
That's the second solution.
Press TRACE (CALC)
Press 5
Press ENTER
Press ENTER
Press the left arrow key 10 times
Press ENTER
Read the X-value:
X = -3.294461
That's the third solution
Edwin