## greysmither 3 years ago Which of the following functions is not a sinusoid? y = sin x y = cosx y = sqrt(x) or They are all sinusoids.

1. ChrisV

y = sqrt(x)

2. lgbasallote

sqrtx...yes

3. ChrisV

sinusoid is a mathematical function that describes a smooth repetitive oscillation

4. ChrisV

|dw:1328886921316:dw|

5. ChrisV

square root sorta looks like |dw:1328887057359:dw|

6. lgbasallote

basically...imagine a DNA but only a single helix =))))))...anyway...obviously sinxis a SINusoid...cosine is just a vertical graph of sinx so both are sinusoid

7. greysmither

OH! I get it now. Thank you guys :) Esp. the drawings, they were very helpful

8. FoolForMath

Yes, if you see the graph of $$y=\sqrt{x}$$ it's easy to note that it's not a sinusoid. you could use this site : http://www.wolframalpha.com/