unit circle

Front

Value of sine at 210º?

Back

-1/2

Front

sin 7π/6

Back

-1/2

Front

cos 5π/6

Back

-√3/2

Front

cos 4π/3

Back

-1/2

Front

Find cos(600°)

Back

(-1/2)

Front

Find sin(-240°)

Back

(√3)/2)

Front

Back

C

Front

Back

C