[" If "x cot^(2)120^(@)+4sin^(2)150^(@)=3," then "x=],[[" 1) "2," 2) "7," 3) "6," 4) "5]]

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If xtan^(2) 120^(@) + 4 cos^(2) 150^(@) = 9 then x =

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tan^(2)120^(@)+cos^(2)150^(@)-sin^(2)300^(@)

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