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Mathematics, 11.02.2021 02:10 jmathematics7806

Consider the function f(x)=cos(0.9x). How much does x have to increase by for 0.9x to increase by 
?
   

What is the period of f?
   

Consider the function g(x)=sin(5πx).

How much does x have to increase by for 5πx to increase by 2π?
   

What is the period of g?


2\pi

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