anonymous
  • anonymous
any tricks to remembering a unit circle?
Mathematics
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
especially the radians?
anonymous
  • anonymous
Draw Circle with radius. If you are familiar with 30-60-90 and 45-45-90 triangle, just use that for remembering the unit circle
anonymous
  • anonymous
iknow the degree measurements..i have a quiz tomorrow and have to fill out the blank circle with cos, sin and radians. I just need tricks to remember how to fill it out

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anonymous
  • anonymous
do you just need 90, 180, 370, 0 degrees, or all reference anglew
anonymous
  • anonymous
all reference angles
anonymous
  • anonymous
you only need to know three angle 30,45,60 for every else you can derive easily
anonymous
  • anonymous
If you know the values for 30,60,45 they will workfor all the angles, the signs will change depending what quadrant the angle is in
anonymous
  • anonymous
ok i got that what about the radians for each angle how do you remember those
anonymous
  • anonymous
remember that one radian is 180 degree. So always know what's the ratio between the angle and 180 and then stick radian. So If i were to find radian eqivilent of 90, I would find ration 90/180=1/2 stick radian sign 1/2 radian
anonymous
  • anonymous
so then 60/180 = pi/3
anonymous
  • anonymous
radian/3
anonymous
  • anonymous
pi/3 radian
anonymous
  • anonymous
what about tangent
anonymous
  • anonymous
iknow it is sin/cos but i cant divide radicals by radicals
anonymous
  • anonymous
So for example lets find tangent of 30 sin 30= 1/2 cos 30= sqrt(3)/2 1/2* 2/sqrt(3) 2/2sqrt(3)

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