question below:

For the functions w= - 3x - 4y , x = cost, and y = sint, express - dw dt as a function of t, both by using the chain rule and by expressing w in terms of t and differentiating directly with respect to t. Then evaluate dw It dt at t= 4 . . . dw Express dt as a function of t. dw dt dw Evaluate at t= - dt dw = dt (Type an exact answer, using radicals as needed.) 4Sketch the curve f(x,y) = c, together with Vf and the tangent line at the given point. Then write an equation for the tangent line. x2 + y2 = 9, (12, 17) . . . Choose the correct sketch. O A. OB. O C. OD. Ay Ay Ay Ay X X X X Choose the correct equation for the tangent line. O A. 217x - 212y= 18 O B. 212x +217y=18 O c. 217x -212y= - 18 OD. 212x +2\\7y= - 18