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Use a graphing calculator to solve the equation -6 cos pi/3 (theta) =4 in the interval from 0 to 2p. Round to the nearest
hundredth.
a. 2.41, 4.17
b. 2.20, 3.80
c. 2.30, 3.98
d. -3.80,-2.20, 2.20, 3.80