11. Evaluate the integral using the substitution u = sec(-5x) : S - 4sec*(-5x) tan(-5x) da. 5sec4(-5ac) + C O 5sec4(-5a) tan(-5x) + C O 4sec (-5x) + C O 4sec'(-5x) + C O sec*(-5x) + C 12. Evaluate the definite integral using the substitution u = cos(x). (7/4 tan(x) dx = 0 4 O In(4) - 1 O - In() O - In(2)14. If y = 2x-3 x2 , then -1= O 3 0 6 0 5 O 2 0 4 15. What is f /(x) given f (x) = tan(2x + 5)? 4 sec( 2x + 5) tan(2x + 5) 8 sec2 (2x + 5) tan(2x + 5) 4 sec2 (2x + 5) tan(2x + 5) 2 sec (2x + 5) tan(2x + 5) 4 sec2(2x + 5) tan?(2x + 5)