



 
Hi Rosie, If √3 × tan(t/3) = 1 then you can divide both sides by √3 and get
There is a triangle that is worth remembering, the so called 306090 triangle. If the angles of a triangle measure 30, 60 and 90 degrees then the lengths of the sides are in the ratio of 1 to 2 to √3. I hope this helps,  


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