Hi Dear can you help me with these? Your help is highy appreciated ??

A. Evaluate the function. 1. if f(x) = cos 2x find f (It / 2). B. Evaluate the derivative using the limit definition and check using the short cut method. 2. f ( X) = VX C. Solve the derivative of the given expression. 4. Y = 6x1/3 _ x3 5. y = (1 + sin x)3/2 6. f(x) = ecot3xs 7. x = Arctan Vt D. Derive the derivative using the shortcut method. 8. d/dx Arccot x = -du/dx 1+ 42