Question

solve 2 cos x-1=0 for 0 <= x< 2 pi

Answer 1

this one should be easy haha

Answer 2

\[\cos x-1=0 \Longrightarrow \cos x=1 \Longrightarrow x=0\]

Answer 3

oh you have 2cosx my bad hehe didn't see 2

Answer 4

its all good

Answer 5

\[2\cos x-1=0 ==> \cos x=\frac{1}{2}\]
so \[x=\frac{\pi}{3}, \frac{5\pi}{3}\]

Answer 6

thanks so much

Answer 7

wlc!