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Derivatives - Trigonometric: Problem 7 Previous Problem Problem List Next Problem Results for this submission Entered Answer Preview Result [4*x-2*sin(2*x)]/[([cos(x)]^2)*(x^2)] 4x - 2 sin(2x) cos2 (x) x2 correct 1.3137 1.3137 incorrect least one of the answers above is NOT correct. (1 point) Let f(x) = 4 tan(x) X . Find the following: 1. f'(x)= (4x-2sin(2x)/(cosx^2(x^2)) 2. f' (3)= 1.31370308 ote: You can earn partial credit on this problem. Preview My Answers Submit Answers ur score was recorded. Microsoft Word u have attempted this problem 14 times. u received a score of 50% for this attempt OCT astv W X P A