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Find the derivative of y = 4 8111 x 9 COS x. Remember to type in the parenthesis for trigonometric functions, for example, sin(x). y'(x) = SubmitAnswer Tries 0/99 Find the equation of the tangent line to the graph of y = 7 8111 x at x = 71'. Tries 0/99 Differentiate hx Vx - 17ex. h' Submit Answer Tries 0/99\fFind the x value at which the derivative of y = 263x is 1. Keep your answer exact. Tries was