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rubyhunter

  • 3 years ago

sin(x+pi) in terms of x

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  1. zordoloom
    • 3 years ago
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    Does this equal 0?

  2. rubyhunter
    • 3 years ago
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    idk thats y i need help, this is how they gave it to me , it didnt say 0

  3. ajprincess
    • 3 years ago
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    sin(x+pi) is in the third quadrant. in the third quadrant only tan value is positive. pi=180 here sin(x+pi)=-sinx

  4. jishan
    • 3 years ago
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    sin(180+x)=-sinx

  5. ajprincess
    • 3 years ago
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    Does that make sense @rubyhunter?

  6. jishan
    • 3 years ago
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    right ajprincess

  7. rubyhunter
    • 3 years ago
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    yea but is -sinx what they mean by in terms of x?

  8. ajprincess
    • 3 years ago
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    yaa

  9. rubyhunter
    • 3 years ago
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    okay thanks

  10. ajprincess
    • 3 years ago
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    welcome:)

  11. jayz657
    • 3 years ago
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    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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