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Mean Value and Graphing

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A) Sketch the Graph of y = cosx in the range -Pi < x < Pi. Hence Sketch the graph of y= |cosx| in the same range.

B) Find the mean Value of y= |cosx| in the range -Pi < x < Pi

P.S. its the |cosx| thats confusing me - I have never seen this format before.

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Mean Value and Graphing are investigated. The solution is detailed and well presented.

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