SOLUTION: Hi, I have been confused by this question and don't know what to do. Use a trigonometric graph to solve the equation 2(cos(3x)) = 1, 0<x<360 Thank you!!

Algebra ->  Trigonometry-basics -> SOLUTION: Hi, I have been confused by this question and don't know what to do. Use a trigonometric graph to solve the equation 2(cos(3x)) = 1, 0<x<360 Thank you!!      Log On


   



Question 847513: Hi, I have been confused by this question and don't know what to do.
Use a trigonometric graph to solve the equation 2(cos(3x)) = 1, 0 Thank you!!

Answer by swincher4391(1107) About Me  (Show Source):
You can put this solution on YOUR website!
Here is what your graph should look like. Perhaps try to put in a TI-83/84 or you can use wolframalpha like I did.
Anyway, we need the answer that is between 0
Notice that all these answers are in radians, so convert them to degrees.
x = 20 degrees, 100 degrees, 140 degrees, 220 degrees, 260 degrees