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Hello, one question is true this ... x = tgu -> dx = sec ^ 2 (u) .du -> du = cos ^ 2 (x) .dx? What are the tangent ratios for P and Q? Could someone help me with this MATLAB problem. I dont know how to put it in matlab for it to solve these ODE's. (exercises 1,2 and 3)? What is the value of x to the nearest degree? Using trigonometric ratio, what is the value of x rounded to the nearest tenth?