5 18. Given the function h(x) = (3 3 3x+2 , find h'(x) in any form. 19. Given the function h(x) = -x sin(2x), find h'(x) in any form. 20. Given the function y = 2x35x2 +4, findin any form. 21. Given f(x)=2 cos (x), find f'(x). 22. Given f(x) = 3 csc (x), find f'(x). 23. Given y = -3 cos (2), find. = 3 csc (3), write the equation of the 27. Given f(x): line tangent to y = f(x) when x = . 28. Given f(x) = sin (x), write the equation of the =- line tangent to y = f(x) when x = 5T