33. Show that r - sinr has neither marima nor minima. – InterviewSolution

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33. Show that r - sinr has neither marima nor minima.

Answer»

for maxima or minima , f'(x) should change its sign from +ve to -ve , or vice versa..

but here f'(x) = 1-cosx that is always ≥ 0 so since f'(x) ≥ 0 so it will not have any maximum or minimum value

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