Derivatives 8. Find a : 1+x a) y = 5x* ( x+1) b) y= 2 - x - 2 c) y = e* +2* + In(x) +logs x X d) y = e) y = tan(x2 +1)4 f) y = 4(2x*+sinx) + log; (x2 +1) 1 + cosx Vx' -1(x2 + 1)3 g) y = x 2/3 9. Where does y = v3 sin x + 3 have a horizontal tangent line? 10. Find the slope of the line tangent to the curve x + 2xy- y =1 at the point (5 , 2). 11. Simplify: a) sin (sin 3x) b) tan(cos x) if 0