What is the period of $y=3 cos 5x$ ?

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Answer 1 · 2014-10-06T02:56:14

The period is $omega=(2pi)/B$ where $B$ is the coefficient of the $x$ term

period $=omega=(2pi)/B=(2pi)/5$

Enter the function after pressing the $Y=$ button

Set the view to show x values from $0$ to $(2pi)/5$

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The calculator changes $(2pi)/5$ to its decimal equivalent.

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Then press the GRAPH to verify that we see a period of the cosine functions.

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What is the period of y=3 cos 5xy=3 cos 5x?