8. The difference of two angles is 20° and their sum is 2 radians. Find each angle in degrees.
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2 radians = 360 degrees
the difference of two angles = 20 degrees
a - b = 20 --------------------> 1
the sum of two angles = 360 degrees
a + b = 360 -------------------> 2
equation 1 + 2
2 a = 380
a = 190
substitute in equation 2
190 + b = 360
b = 360 - 190
b = 170
Solution (a=190, b=170)
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