Find the reference angle for an angle measuring -300⁰
60⁰
-60⁰
30⁰
45⁰
Find a coterminal angle to 200 degrees.
-520
-200
160
-380
Formula [Reference angle = Actual angle - 180] is for
quadrant 1
quadrant 2
quadrant 3
quadrant 4
What is the sin(120)?
-1/2
1/2
-root(3)/2
root(3)/2
What is the cos(585)?
1/2
root(2)/2
-root(2)/2
-root(3)/2
What is sin(-660)?
root(3)/2
1/2
-1/2
1
What is cos(810)?
1/2
1
0
-1
What is sin(300)?
1/2
-1/2
root(3)/2
-root(3)/2
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