Sin, Cos, Tan Equivalent Reference Angles
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cos theta 180
-1
sin theta 270
-1
cos theta 270
0
cos theta 90
0
sin theta 0
0
sin theta 180
0
tan theta 0
0
tan theta 180
0
cos theta 0
1
sin theta 90
1
tan theta 45
1
cos theta 60
1/2
sin theta 30
1/2
radians-degrees
180/pi
degrees-radians
pi/180
cos-sec
reciprocal
sin-csc
reciprocal
tan-cot
reciprocal
cos theta 45
square root 2/2
sin theta 45
square root 2/2
tan theta 60
square root 3
cos theta 30
square root 3/2
sin theta 60
square root 3/2
tan theta 30
square root 3/3
tan theta 270
undefined
tan theta 90
undefined
