Posted by
lina on
.
find all values of x in (o, Pi) that satify the given equation
cos x/3=1/2

precalculus 
mae,
1.5

precalculus 
Steve,
cos(pi/3) = 1/2
cos(5pi/3) = 1/2
so, x = pi or 5pi

precalculus  PS 
Steve,
oops only in [0,pi], so x=pi
However, you gave the interval as (0,pi), which excludes pi, so no solution.