anonymous
  • anonymous
sin(x+pi) in terms of x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
Does this equal 0?
anonymous
  • anonymous
idk thats y i need help, this is how they gave it to me , it didnt say 0
ajprincess
  • ajprincess
sin(x+pi) is in the third quadrant. in the third quadrant only tan value is positive. pi=180 here sin(x+pi)=-sinx

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anonymous
  • anonymous
sin(180+x)=-sinx
ajprincess
  • ajprincess
Does that make sense @rubyhunter?
anonymous
  • anonymous
right ajprincess
anonymous
  • anonymous
yea but is -sinx what they mean by in terms of x?
ajprincess
  • ajprincess
yaa
anonymous
  • anonymous
okay thanks
ajprincess
  • ajprincess
welcome:)
anonymous
  • anonymous
you can try this using the identity sin(x + pi) = cos(x)sin(pi) + sin(x)cos(pi) sin(pi) = 0 cos(pi) = -1 so you get cos(x)(0) + sin(x)(-1) = -sinx

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