Question

Which of the following functions is not a sinusoid?

A. y = cos x
B. y = sin x
C. y = x2
D. None of the above are sinusoids.

Answer 1

It's C right? I just wasn't sure..

Answer 2

yes it's C

Answer 3

Thank you!

Answer 4

welcome

Answer 5

in general, \(A sin (\omega x+\phi)\) is sinusoidal , sin x and cos x fall in this category :)

Answer 6

Oh! Wait, okay... I see now

Answer 7

sin x when A = 1, w=1 and phi = 0
cos x when A=1, w=1 and phi = pi/2

Answer 8

sin: Φ = 0
cos: Φ = π/2


Gotcha!

Answer 9

phi = -pi/2 will also give you a cos function
using, \(\sin(\pi/2-x)=\cos x\)