sammietaygreen
  • sammietaygreen
State the amplitude, period, and phase shift of the function y = -0.4 sin (10x+pi/2). I know the period is pi/5
Mathematics
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SOLVED
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schrodinger
  • schrodinger
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FortyTheRapper
  • FortyTheRapper
Amplitude is the quantity in front of the trig
sammietaygreen
  • sammietaygreen
What is the trig again?
sammietaygreen
  • sammietaygreen
like before the "sin"

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FortyTheRapper
  • FortyTheRapper
Correct
sammietaygreen
  • sammietaygreen
All my answer choices are positive 0.4, is there a reason for that?
FortyTheRapper
  • FortyTheRapper
Because it's always the absolute value |A|
Directrix
  • Directrix
@sammietaygreen The attached chart may help.
sammietaygreen
  • sammietaygreen
Ohhh, okay how do I find phase shift? I kinda figured it was 0.4 since that's the only answer choice but I wanted to know how
FortyTheRapper
  • FortyTheRapper
Phase shift is C/B And your equation is |A|Sin(B+C) So you would do (pi/2)/(10x/1) You could multiply by the reciprocal
FortyTheRapper
  • FortyTheRapper
Pi. 1 -- times -- 2. 10x Sorry, I'm on a phone typing this
sammietaygreen
  • sammietaygreen
so like pi/20?

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