Cos X = 0.6, what is X?

9 answers by real people - Cos X = 0.6, what is X?

• GetTopUp Team

  10 hours ago

  cos(x) = -0.6

  x = 126.86 or 127° answer//

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• Sean J

  10 hours ago

  Cos(x) = 0.6 means that x = ArcCos(0.6) = 53.13 degrees. This means that the radius vector in the unit circle is 53.13 degrees measured anticlockwise from the right hand horizontal initial position.

  Cos(x) = -0.6 This means that the radius vector in the unit circle is in the second or third quadrant.

  Thus the value of ‘x’ is either 180 – 53.13 = 126.87 degrees or 180 + 53.13 degrees = 233.13 degrees.

  Now key in 126.87 degrees into a calculator and press Cos. It will come back with -0.6

  Also key in 233.13 degrees into a calculator and press Cos. It will come back with -0.6

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• Anonymous

  10 hours ago

  You have to use the inverse button on the calculator usually marked Inv or cos^-1 for cosine depending on which calculator you have.

  if in doubt which button look at the booklet that came with the calculator

  now

  Press Inv

  enter 0.6

  press cos^-1

  Answer: 53.13 degrees

  The other degrees which give the answer 0.6 for cosine is 360 – 53.13 = 306.87

  so you need to know what the question asks you

  So we have

  cosine 53.13 = 0.6……………[correct to 2 decimal places]

  cosine 306.87 = 0.6………….[correct to 2 decimal places]

  306.87 is in what is called the fourth quadrant of the unit circle.

  JUST SEEN YOUR ADDITIONAL INFORMATION

  use the same method of inversing

  Cosine 126.87 = – 0.6

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• I ask I answer

  10 hours ago

  cosx = -0.6

  => x = cosinv (-0.6)

  => x = 180 -+ cosinv (0.6)

  => x = 180 -+ 53.13 (calculation from calculator or by tables)

  => x = 126.87 or 233.13 depending on if you want the answer in 2nd or 3rd quardant.

  Further you can keep on adding 360 to get more answers in multiple cycles.

  This answer is in degrees. To get the answer in radians multiply by (pi/180)

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• ?

  10 hours ago

  am not sure but cos x = 0.6 then x = cos-1 [inverse] o.6 = your answer

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• Anonymous

  10 hours ago

  Here´s what i think.

  Cos X = -0.6

  You have to place Cos on the right side so you get the inverse Cos^-1

  Gives:

  X = Cos^-1 -0.6

  So now all you have to do is calculate it

  X = 126.8698976

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• Anonymous

  10 hours ago

  press on your calculator sift cos-0.6 and you will get 126.87 deg

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• Arul Seth

  10 hours ago

  cos x=-0.6

  x=0.6/cos

  haha

  1
• Anonymous

  10 hours ago

  126.86

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