ay =-0. 5 - 0 . 5 = 3 x (12 ) da 0 . 5 3 x 12x 12 2-1. 6 x 10 #t/ min 4. Use the information gained from the first and second derivative test to graph the function f(x) = r + 2 cos x on [-27, 27]. Be sure to identify the intervals where f(x) is increasing, decreasing, concave up, concave down as well as all critical values, inflection points, absolute maximums and absolute minimums. - ful=xArcosx f = 1 + 2 ( - sinx ) unit linde @ = 1 - 2 sinx $- 1- 2sinx - 1 = - 2sinx = 0 - 2 (sin 10 ) - 2 - Z STA = - 2 (0 ) = 0 - = Sin ( x ) N