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pre-calculus

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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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