Question 773590
Find &#952; to four significant digits for 0 &#8804; &#952; < 2&#960;.

cot &#952; = -2.713
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tan = 1/cot
tan = 1/(-2.713)
Use a calculator
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Tangent is negative in Q2 & Q4

angle = 159.7663 degrees
angle = 339.7663 degs
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If you want radians:
angle = 2.7884
angle = 5.9300