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

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

Mathematics
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cosx=-1
thats not even english to me.
ok

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Other answers:

  • hba
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°
would it be that?
is it sin2x or \(sin^2 x\) ??
sin squared x
then sin x=1 is correct. but do u need solutions in the range of 0 to 180 only or all solutions ?
no idea. the question say find all solutions to the equation
because sin (360+90) also =1
yes, all solutions means u don't have only 1 solution, u have infinite
alright
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,....`
got that ^ ?
yeah. is that the answer
yes.
you sure. i can wrrite that & ill be correct?
if i wrote exactly what you just put down ill be correct?
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,..
  • hba
Whats The Range ? I think It Would Be 0 to 180
thanks

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