equation of the graph

[worn plinth]

What would the period be? I think the graph is y=-9cos(_x) but I can't seem to know how to get the period. Thanks!

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[worn plinth]

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[worn plinth]

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[high mural]

As u can see there, one revolution is completed from 0 to 2π/5. So the period must be 2π/5

So, $\frac{2\pi}{B} = \frac{2\pi}{5} \implies B = 5$

[uneven hornet]

kartoffan ♡

[high mural]

@worn plinth

[high mural]

This is a sine function but the formula for B is the same for cosine

[worn plinth]

Thank you! So would the equation be y=-9cos(5x) since 2pi/2pi/5 =5 because 2pi/5 is the period?

[distant slate]

@worn plinth has given 1 rep to @high mural

[high mural]

Yes

[worn plinth]

Got it 🐈

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