Please write the answers by the hand. It is easier for me to understand

14.5 Partial Derivatives Use the Chain Rule to find Oz/as and Oz/at. z = tan (x] +y ), x = slut, y=te: 28 Use the Chain Rule to find the indicated partial derivatives. P= Vultur+w, u=xe", v = yet , w = exy; ap ap Ox ' dy when x = 0, y = 2 34 Use Equation 5 to find dy/ da. 5 OF dy da OF Fy ay ey sin x = c + cy 49 49. If z = f (x, y), where z = rcos 0 and y = rsin 0, a. find Oz/ar and Oz/20 and Answer + az/ar = (Oz/Ox) cos 0 + (az/dy) sin 0, az/20 = - (z/8x) r sin 0 + (Oz/dy) r cos 0 b. show that + (2z )2 +1 (82 ) 2 55 If z = f(x, y), where x = rcos e and y = r sin 0, show that 1 oz Ox 2 ay 2 27 2 72 202 r Or