Which formula gives the x-coordinates of the maximum values for y = cos(x)?

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y

Find the solution(s) to x^2-14+49=0