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السلام عليكم ( بعد حل استاذنا شحات جامع

Q17)
Cos is A function from R to the closed interval from -1 to 1
Cos ( cos) is a function from the closed interval from -1 to 1 to the closed interval from -1 to 1From the graph of cos on the interval from-1 t o 1We have the max value Of the function cos(cos x ). =1 at cos x=0 and the min value =cos (1) at cos x=1 and at cos x=-1

هناك نقطة حرجة اخرى عند x=.0625+2 pi
قيمة الدالة f عندها تقريبا 1.98

Approximately Min value for the function is 1.98

Max value at x=pi/2 which is equal 4+sqrt(2)

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لا اشاهد حلا