Gmail . LTE 20:39 a docs.google.com y = Arctan ( sinh (2x) ) ; y' = * - 2 coshx / ( 1 + sinh^2 (2x) ) 2 coshx / ( 1 + sinh^2 (2x) ) 2/ cosh (2x) 1/ cosh x NONE OF THE ABOVE y = log ( cos(2x) ) ; y' =* 2 tan ( 2x ) / In (10) - 2 tan ( 2x ) / In (10) O 2 cot ( 2x ) / In (10) O - 2 cot ( 2x ) / In (10) O NONE OF THE ABOVE ! cos 2y = (x^2) + 4 ; y' =*