MEDAL

Which of the following is a sinusoid?
A. (x^2/3) + (y^2/6) = 1
B. x^2 + y^2 = 1
C. y = x^(1/3)
D. y = cos(x) - 2

Question

MEDAL

Which of the following is a sinusoid?
A. (x^2/3) + (y^2/6) = 1
B. x^2 + y^2 = 1
C. y = x^(1/3)
D. y = cos(x) - 2

anonymous · Answer

@magbak @Mertsj @robtobey @Luigi0210 @terenzreignz

luigi0210 · Answer

sinusoid means sine wave?

anonymous · Answer

Yes!

agent0smith · Answer

The only sinusoidal function is the one with a cosine of x.

luigi0210 · Answer

Well there's only one function there close to sine.. cosine..

anonymous · Answer

Thats what I was thinking. Is that because cos(x) = sin(x + π/2)?
I wanted to make sure D. was the answer

anonymous · Answer

Thank you both

anonymous · Answer

See attached plot.

agent0smith · Answer

" Is that because cos(x) = sin(x + π/2)"
Yep.

anonymous · Answer

Okay, thanks guys! I have to recheck my work

agent0smith · Answer

anonymous · Answer

@agent0smith

Thank you for the site reference.