anonymous
  • anonymous
Find all solutions to the equation. 7 sin2x - 14 sin x + 2 = -5 Can someone walk me through this? The online notes are little help.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Astrophysics
  • Astrophysics
You can set it up as \[sinx = x\] then you have \[7x^2-14x+2 = -5\] or you can just use sinx, but this may seem easier to you so you can plug in sinx afterwards for x. You'll have to use difference of squares.
marihelenh
  • marihelenh
First, add the 5 to both side to get a 0 on the right side.
Astrophysics
  • Astrophysics
Yeah.

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anonymous
  • anonymous
Then I just solve for x?
anonymous
  • anonymous
Okay thanks. I didn't realize it was that simple.
marihelenh
  • marihelenh
You can factor out a seven and then factor for the rest.
Astrophysics
  • Astrophysics
Yeah, and you'll have to plug sinx back as x to find the solution
anonymous
  • anonymous
So you'd finally come to 7(x+1)(x-1) then what do you do?

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