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Quandaries & Queries
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 Topic: periodic function
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 A periodic function 2008-11-26 From Ali:A periodic function f(x) has a period of 9, if(2)=-3 and f(5)=13, determine the value of f(11)? tks /rgrds AliAnswered by Penny Nom. The number of hours of daylight 2008-06-03 From Marilyn:Hi, could you please help me with this question? In a city (in the Northern Hemisphere) the minimum number of hours of daylight is 9.6 and the maximum number is 14.4. If the 80th day of the year (March 21) has 12 hours of daylight, determine a sine function which gives the number of hours of daylight for any given day of the year. (Jan 1 = 1, Jan 2 = 2, etc). Thank you!Answered by Harley Weston. Period 1999-12-28 From Mahdawi:I have attached a diagram of the graph, and I need to find out its period. I really don't understand how to do so, please help! Answered by Harley Weston.

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