Question 236936
sin o = 4/5 = .800
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use  arc  sine  to  find  ,,,,,o= 53.13 degrees,,,(2nd  function  sin  on  calc)
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This  shows  that  sin 53.13 = .8,,,ok,,,but  there  is  no  53.13 degrees  in Quadrant 2
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Using  the 180 degree  ref  line,,,,o' = 180- 53.13 = 126.87 degrees
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checking sin  126.87 = .8,,,,ok
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Now  tan 126.87 = - 1.333 ,,,,,,
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OR  -4/3
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