themaster66644 themaster66644
  • 10-12-2018
  • Mathematics
contestada

what is the value of cos-1(-1/2)

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wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 10-12-2018

Answer:

120 degrees or 2 pi/3

Step-by-step explanation:

cos ^ -1 (-1/2)


Using the unit circle, we look for the x value of -1/2.  Cos is the x value, sin is the y value.  We find -1/2 at 120 degrees or 2 pi/3


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AlienFlo
AlienFlo AlienFlo
  • 08-04-2021

Answer:

2pi/3

Step-by-step explanation:

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