The sine is positive in second quadrant so sin 20 = sin (180-20) = sin 160.
The sine is negative in the third quadrant so sin (180+20) = -sin 20
so sin 20 = - sin 200
The sine is negative in fourth quadrant so sin 340 = -sin 20 and sin 20 = - sin 340.
Answer and work above! hope this helps c:
The number that presents 8/9 to the nearest percent is .89.
