# pre-calculus

posted by .

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

• pre-calculus -

1.5

• pre-calculus -

cos(pi/3) = 1/2
cos(5pi/3) = 1/2

so, x = pi or 5pi

• pre-calculus - PS -

oops only in [0,pi], so x=pi

However, you gave the interval as (0,pi), which excludes pi, so no solution.

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