## greysmither Group Title Which of the following functions is not a sinusoid? y = sin x y = cosx y = sqrt(x) or They are all sinusoids. 2 years ago 2 years ago

1. ChrisV Group Title

y = sqrt(x)

2. lgbasallote Group Title

sqrtx...yes

3. ChrisV Group Title

sinusoid is a mathematical function that describes a smooth repetitive oscillation

4. ChrisV Group Title

|dw:1328886921316:dw|

5. ChrisV Group Title

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

6. lgbasallote Group Title

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 Group Title

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

8. FoolForMath Group Title

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/