Given the equation 12 + y? = 9, find - dy O O 13) Find the derivative. Of'(z) = 2 tan zsec.I f(x) = tan2x Of'(z) = sectx Of' ( I ) = -cos'z - sin z cos cos I Of'(z) = 2tanz None of the above 14) Simplify the expression: tan(x) - cot(x) sin(I) . - cos(I) . 1 2 sin (x) cos(x) sec ( I) CSC(I) 0 0 01 15) dy dy Given y = sin r, find dy O - COS I dy O sin I dr dy O = COS I dy = sin c