Determine if this set of functions is linearly independent or linearly dependent.
If dependent, state the non-zero values of the constants that make
$$C_1y_1 + C_2y_2 + C_3y_3 = 0.$$
If independent, state the value of the Wronskian.
$$y_1 = 1, \ y_2 = \sin^2(x), \ y_3 = \cos^2(x)$$