anonymous
  • anonymous
I"m really confused, I don't understand how to get the exact real value of
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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Jhannybean
  • Jhannybean
of?...
anonymous
  • anonymous
arcos (1/2)
anonymous
  • anonymous
*arccos

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mathstudent55
  • mathstudent55
arccos = cos^-1 = inverse cos
mathstudent55
  • mathstudent55
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primeralph
  • primeralph
yeah frag it.... 60 deg.
anonymous
  • anonymous
thanks guys, but my only answer choices are pi over certain numbers
primeralph
  • primeralph
pi/3
primeralph
  • primeralph
|dw:1370812461734:dw|
anonymous
  • anonymous
oh okay thanks
mathstudent55
  • mathstudent55
wlcm
mathstudent55
  • mathstudent55
60 deg * pi/180 deg= pi/3
anonymous
  • anonymous
what steps did you take to figure that out? @mathstudent55
mathstudent55
  • mathstudent55
A cosine value of 1/2 is well known because it comes from the 30-60-90 triangle. Since you needed arccos 1/2, that means you are looking for the angle whose cosine is 1/2. Using the triangle I drew, you can see that the angle is 60. Then you said all answers have pi in them, that means they are asking fir an answer in radians, not degrees. To convert degrees to radians, you multiply the degrees by pi/180. So 60 degrees = 60 * (pi/180) radians = pi/3 radians

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