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Student XII IPA
b. f(x) = COS :-), pada interval - 27 x S 27 1 C. f(x) sin’x, pada interval Osxs 27
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Putra Gema Nusa
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T 4. / - T EX < 2T f(x) = cos({x- # titik stasioner , f'(x)=0 f'x) = 12 - sin ( 2x - 1 14 T # X-45 180 tk. 360 2 x=450° tk. 720° 7 k=-1 X=-270' 0 는 sin X-45° sin ( 1 & X-95 (2x- X Sin 0 5 -21 -270* 90° 2t # x 0 k # x 45° =0 tk. 360° 2 X = 90° + k.720° NIX #fungsi naik , f'(x) >O sin (2x-45) >0 n o 20 # fungsi turun, f'(x) <0 -sin (2x-45°) <0 -21 EX <-270° v goo <x< 2T .: -270°< X < 90° sler 0 + x = 90° Dahamify
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