Question

find all solutions of the equation 2cos 3x =1 in the interval [0,pi).

Answer 1

when does cos(t) = 1/2 ?

Answer 2

and check the interval, is that spose to be pi or 2pi

Answer 3

pi/3 and 5pi/3 thas wher cos 1/2

Answer 4

then 3x needs to be pi/3 or 5pi/3

Answer 5

the interval is 0,pi

Answer 6

then when 3x = pi/3 is our only concern

Answer 7

2cos 3x =1

cos 3x =1/2

cos t =1/2, t = pi/3

3x = pi/3

Answer 8

thnks