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Question
secondary 4 | A Maths
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= tan (60 + 45)
= (tan 60 + tan 45) / (1 - tan 60 tan 45)
= (sq 3 + 1) / (1 - sq 3)
= (sq 3 + 1) (sq 3 + 1) whole thing divided by (1 - sq 3) (1 + sq 3)
= (3 + sq 3 + sq 3 + 1) / (1 - 3)
= (4 + 2 sq 3) / (-2)
= -2 - sq 3
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