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logynklode Group Title

7 sin2x - 14 sin x + 2 = -5 find all solutions

  • one year ago
  • one year ago

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  1. rvgupta Group Title
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    cosx=-1

    • one year ago
  2. logynklode Group Title
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    thats not even english to me.

    • one year ago
  3. rvgupta Group Title
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    ok

    • one year ago
  4. hba Group Title
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    @hartnn

    • one year ago
  5. logynklode Group Title
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    7sin²(x) - 14sin(x) + 2 = -5 7sin²(x) - 14sin(x) + 7 = 0 7(sin²(x) - 2sin(x) + 1) = 0 sin²(x) - 2sin(x) + 1 = 0 (sin(x) - 1)² = 0 sin(x) - 1 = 0 sin(x) = 1 x = 90°

    • one year ago
  6. logynklode Group Title
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    would it be that?

    • one year ago
  7. hartnn Group Title
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    is it sin2x or \(sin^2 x\) ??

    • one year ago
  8. logynklode Group Title
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    sin squared x

    • one year ago
  9. hartnn Group Title
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    then sin x=1 is correct. but do u need solutions in the range of 0 to 180 only or all solutions ?

    • one year ago
  10. logynklode Group Title
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    no idea. the question say find all solutions to the equation

    • one year ago
  11. hartnn Group Title
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    because sin (360+90) also =1

    • one year ago
  12. hartnn Group Title
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    yes, all solutions means u don't have only 1 solution, u have infinite

    • one year ago
  13. logynklode Group Title
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    alright

    • one year ago
  14. hartnn Group Title
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    sin(x)=1 sin x = sin (90+360n) (n=1,2,3,....) so x= 90+360n are all the values of x with n=1,2,3,....`

    • one year ago
  15. hartnn Group Title
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    got that ^ ?

    • one year ago
  16. logynklode Group Title
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    yeah. is that the answer

    • one year ago
  17. hartnn Group Title
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    yes.

    • one year ago
  18. logynklode Group Title
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    you sure. i can wrrite that & ill be correct?

    • one year ago
  19. logynklode Group Title
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    if i wrote exactly what you just put down ill be correct?

    • one year ago
  20. hartnn Group Title
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    idk how your teacher / system demands the answer, but any of these 2 answers are complete and correct: 1) x= 90+360n , n=1,2,3,..... 2) x=90,450,810,..

    • one year ago
  21. hba Group Title
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    Whats The Range ? I think It Would Be 0 to 180

    • one year ago
  22. logynklode Group Title
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    thanks

    • one year ago
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