Need help with sinusoidal functions

  • #1
1. Hello everyone, I am having some trouble determining precise phase shifting by observing the graphs.

dRt4B.jpg


book says this graph has horizontally shifted to the right by 15 units. How was this determined? I can't figure it out!

second this graph:
hLXCQ.jpg

Says the graph was shifted 80 units to the right but again how is this determined? Please help thnx
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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Welcome to PF!

Hail DoomBringer2! Welcome to PF! :smile:
book says this graph has horizontally shifted to the right by 15 units. How was this determined? I can't figure it out!

Says the graph was shifted 80 units to the right but again how is this determined?

Concentrate on the middle of the graph …

at zero phase shift, it should have that middle value at time 0. :wink:
 
  • #3
157
0
Hint: What does the normal sin function look like without any left or right shifts?
 
  • #4
thanks a lot guys and gals, I am about to submit my work. hopefully I got it right lol
 

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