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Which of the following functions is not a sinusoid?
y = sin x
y= Sqrtx
y = cos x
None of the above are sinusoids.
 11 months ago
 11 months ago
Which of the following functions is not a sinusoid? y = sin x y= Sqrtx y = cos x None of the above are sinusoids.
 11 months ago
 11 months ago

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ghaziBest ResponseYou've already chosen the best response.2
definitely \[\sqrt x\] is not a sinusoid , it doesn't vary as a sine wave or a cosine wave
 11 months ago

kaylalynnBest ResponseYou've already chosen the best response.1
thats what i was thinkging thanks!!
 11 months ago

kaylalynnBest ResponseYou've already chosen the best response.1
btw does a sinusoid have to go below the x axis??
 11 months ago

ghaziBest ResponseYou've already chosen the best response.2
no, sinusoid wave are those which show a smooth repetitive variation or oscillation , like a sine wave or a cosine wave , it doesn't have to go below x axis, if you shift the origin up with respect to the original origin you wont have it below x axis, its just a general trend
 11 months ago

ghaziBest ResponseYou've already chosen the best response.2
dw:1369863941221:dw O new is the new origin
 11 months ago

reemiiBest ResponseYou've already chosen the best response.0
I would say yes (it has to go below), since I take as definition that a sinusoid is a function of the form \(\lambda \sin(\alpha x + \phi)\), with \(\lambda, \alpha, \phi\in\mathbb R\). But you allow a vertical translation in your definition the answer is yes..
 11 months ago

kaylalynnBest ResponseYou've already chosen the best response.1
how bout this then??
 11 months ago

reemiiBest ResponseYou've already chosen the best response.0
you have to find in your definition in your course. (wikipedia says that the general form allows for a vertical shift). If your definition is the general definition, then there are two sinusoid curves on this picture.
 11 months ago
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