cosec square 60° - cot square 60°
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[2/(3)^1/2]^2 - [1/(3)^1/2]^2
4/3 - 1/3
(4-1)/3
3/3
1
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= (2\√3)² - (1\√3) =4\3 - 1\3 =3\3 =1
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