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Tan 120' - Csc 45 -√3/3 - √2
= -1
-√3 - 3√2
3
= ( 3 ) (√3 - √2)
(√3 + √2)(√3 - √2)
= 3√3 - 3√2
3 - 2
= 3√3 - 3√2