Verify that the indicated pair of functions is a solution of the given system of differential equations on the interval (-∞, ∞). d?x 4y + et dt2 d²y = 4x et dt? х 3 1 et cos(2t) + sin(2t) + -cos(2t) – sin(2t) - 5 When x = cos(2t) + sin(2t) + Let, dx dt d²x dt? When y = -cos(2t) – sin(2t) – ÷e', dy dt d?y dt? Thus, in terms of t, d?x 4y - et – 4(-cos(2t) – sin(2t) – e) - et dt? and d?y 4x + et 4( cos(2t) + sin(2t) + + et dt? II