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What coordinates on the unit circle are associated with the angle measure?

210° 

−7π/4
34π/3
 

 Feb 9, 2020
 #1
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210°  =    30°  reference angle in the  3rd quadrant.......the coordinates  are  ( -√3/2  ,-1/2)

 

-7pi /4  =   2pi - 7pi/4 =  8pi /4  - 7pi/4 =  pi / 4 = 45°  ....the coordinates are  (√2/2, √2/2)

 

34pi/3  = 11pi + pi/3  =  240°   = 60°refernce angle in the 3rd quadrant.....the coordinates are  ( -1/2, -√3/2)

 

 

 

cool cool cool

 Feb 10, 2020
edited by CPhill  Feb 10, 2020

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