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Solve the equation on the interval [0,2π).

−9cosx=4

Select all correct solutions.

  • approximately 1.111
  • approximately 2.031
  • approximately 4.252
  • approximately 5.173
 Mar 16, 2020
 #1
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cosx = -4/9     in quadrant 2 and 4

 

arccos (-4/9) = 2.03 R   and 4.25 R

 Mar 16, 2020

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