Question

Need help!!
4. Solve for x: cos 3x=1/2 0 10 years ago

Answer 1

If you want all x solutions between 0 and pi, find all 3x solutions between 0 and 3pi

Answer 2

\[\cos (3x)=\frac{1}{2}\]
\[3x=\frac{\pi}{3}, \frac{7\pi}{3},\frac{13\pi}{3}\]

Answer 3

\[x=\frac{\pi}{9},\frac{7\pi}{9}, \frac{13\pi}{9}\]

Answer 4

Whoops...one too many. Discard 13pi/9

Answer 5

wait how you get 7pie/3

Answer 6

I get pie/3

Answer 7

know how can I find the other solutions

Answer 8

Plz help me

Answer 9

Add 2pi to pi/3

Answer 10

Each time around the circle will give another solution.

Answer 11

don't you get 5pie/3

Answer 12

What is 1/3 + 6/3 ?