Posted by **Lenny** on Tuesday, December 13, 2011 at 7:19pm.

The set of solution(s) of 2 cos^2

(θ) - 13 cos(θ) + 6 = 0 that is(are) in the

interval (0,π/2) is one of following

a. {π/6} b. {π/3}

c. {π/4}

d. {π/3, π/6}

e. {π/6, π/4}

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