Question

Which graph represents a phase shift of pi/2 units right for the graph of y=cos x

Answer 1

Your answer is b. y = sinx

Hope I helped!
Let me know if you need anything else!
~ Zoe

Answer 2

we are given that
`y=cos x`

Here we are going to plot two curves one for cosx and the othere also of cosx but after making a phase shift of
`\pi/2`

When we do a phase shift by an angle of theta , in that case actaully we add angle negative theta .

For example when we shift the phase of sinx by
`\pi/2` we get
`sin(x-\pi/2).`

Hence we are going to plot the curve of

`y=cosx\\ \\ y=cos(x-\pi/2)=sinx\\`

Hence the correct option is B.