Question

any tricks to remembering a unit circle?

Answer 1

especially the radians?

Answer 2

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

Answer 3

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

Answer 4

do you just need 90, 180, 370, 0 degrees, or all reference anglew

Answer 5

all reference angles

Answer 6

you only need to know three angle
30,45,60 for every else you can derive easily

Answer 7

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

Answer 8

ok i got that what about the radians for each angle how do you remember those

Answer 9

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

Answer 10

so then 60/180 = pi/3

Answer 11

radian/3

Answer 12

pi/3 radian

Answer 13

what about tangent

Answer 14

iknow it is sin/cos but i cant divide radicals by radicals

Answer 15

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)