30. A point moving along the graph of the function y = sin 6x such that centimeters per second. Find dy dt when X = 7. A. dy y 2TT = 6 cos 6 B. = 12 cos dt 7 dy 6TT = dt C. dy D. V-12 cos 2 dt 6 cos 7 49. Find y if 8xy+6x=3y A. 4y+6xy + 4x 3 xy 3xy - 4y B. 4x 4x-3xy C. D. 6 xy+4y 4y+6 xy 3 xy-4x dx dt 2 33. Find an equation of the line that is tangent to the graph of the function f(x) = 3x3 and parallel to the line 9x - y + 9 = 0. A. y = -9x+6 B. y 9x 3 and y = 9x + 3 C. y=-9x-6 D. y = 9x-6 and y = 9x+6 50. Find an equation to the tangent line for the graph of f(x) = tanx at the point (AT, 0.078). Round coefficients to two decimal places. A. y=-1.31x + 3.36 B. y 1.31x+3.36 C. y=1.06x+3.36 D. y 1.06x-3.36