Posted by Krsz on Friday, July 16, 2010 at 8:49am.
your teacher probably expects you to know the ratios of sides of the 30-60-90 and the 45-45-90 triangles
they are
1 : √3 : 2 and 1 : 1 : √2
make a sketch to see the sides and the sides
so cot30°sec45°
= √3√2 = √6
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