anonymous
  • anonymous
please helppp mee transformation y=sinx to y=-2sin(3x-⫪/4)+2 can someone explain why it would be a horizontal shrink by 1/3 vs horizontal shrink by 3
Mathematics
katieb
  • katieb
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Mertsj
  • Mertsj
Because the coefficient of x = 2pi/period so 3=2pi/period so 3(period) = 2pi and the period = 2/3 pi instead of the normal 2pi
anonymous
  • anonymous
okay so f it was like (1/3 x - ⫪/4) then the answer would be a horizontal stretch by 3 ?
Mertsj
  • Mertsj
you would plug the coefficient of x into the equation I gave you and solve. coefficient of x = 2pi/period

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Mertsj
  • Mertsj
1/3=2pi/period
anonymous
  • anonymous
to be honest i have no idea where you got that equation lol

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