SOLUTION: Graph the equations y=cos2x and y=-2sinx in the interval 0<=x<=2(3.14). How many values of x in the interval 0<=x<=2(3.14) satisfy the equation -2sinx-cos2x=3?

Algebra ->  Trigonometry-basics -> SOLUTION: Graph the equations y=cos2x and y=-2sinx in the interval 0<=x<=2(3.14). How many values of x in the interval 0<=x<=2(3.14) satisfy the equation -2sinx-cos2x=3?      Log On


   

Question 864212: Graph the equations y=cos2x and y=-2sinx in the interval 0<=x<=2(3.14). How many values of x in the interval 0<=x<=2(3.14) satisfy the equation -2sinx-cos2x=3?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!

y=cos%282x%29 - Red
y=-2sin%28x%29 - Green
y=-2sin%28x%29-cos%282x%29-3 - Blue
.
.
.
-2sin%28x%29-cos%282x%29-3=0 in one place between (0.0,2pi).
Namely at x=%283%2F2%29pi