help
@Vocaloid
@Vocaloid
Please post your question
i plotted yesterday but they all look the same
?
that's what i got but 12 is the period i know that
judging by this graph - the period is 12 and the amplitude is about 4, so we can eliminate C and D let's try and think about the horizontal shift
im thinking b
a looked correct when i graphed it
hm - if we change the function to cos this is what we get
notice how it starts decreasing from 0 instead of increasing like the actual function
okay could you help with more this topic is kind of confusing
@Vocaloid
@sillybilly123
is it a
it's a negative cosine function with some shifting up the y - axis
@sillybilly123
@sillybilly123
so this looks like a negative sine function |dw:1518720857562:dw| you just gotta roll with it
period is: trough to trough; or peak to peak. which is about 10 amplitude is sorta 47 - (-4) seems to have a period of about 10 so you just roll from there
well that is still all choices that follow that
@sillybilly123
not really it is in the form \(y = - A \sin (kx) + y_o\) and \(y_o \approx 26\) So \(y - 26 = - A \sin (kx) \) And then you can add in an amplitude: \(y - 26 = - (44 - 4) \sin (kx) \) for k ,you have \(k = \dfrac{2 \pi}{\lambda}\) And: \(\lambda \approx 10\), which was the approximation mentioned above etc
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