2. Prove (arctan x) = 14x2 O 3. Find the derivative of f(x) = cos-'(3x2) 4. Find the derivative of y = x3 Arcsin (2x) Use Implicit Differentiation to find dy. 5. 4cosxsiny = 1 6. xsiny + cosby = cosy O 7. If 4x2 + 2xy + 3y = 9, find the equation of the tangent line at the point (2,-1).Name: Please show all work on this page. For exercises 1, 2, and 3, find an using implicit differentiation: 1. Prove (arccosx) = 1-x 2. Prove - (arctan x) = 14x2 O 3. Find the derivative of f(x) = cos-'(3x2) 4. Find the derivative of y = x Arcsin (2x) Use Implicit Differentiation to find dy. 5. 4cosxsiny = 1 6. xsiny + cosby = cosy O