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In this problem, x = c1 cos t + c2 sin t is a two-parameter family...

In this problem, x = c1 cos t + c2 sin t is a two-parameter family of solutions of the second-order DE x'' + x = 0. Find a solution of the second-order IVP consisting of this differential equation and the given initial conditions.

x(π/6) = 1 2 , x'(π/6) = 0

x=

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