Question 414737
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Hi
Note: A 45-45-90 Triangle, the ratio of sides is 1:1:sqrt(2)
 sin(45) = opp/hyp = 1/sqrt(2) = sqrt(2)/2 
 cos(45) = adj/hyp = 1/sqrt(2) = sqrt(2)/2 
 Tan(45) = {{{(sqrt(2)/2)/(sqrt(2)/2)}}} = 1
<img src="http://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Trigonometry_triangle.svg/200px-Trigonometry_triangle.svg.png ">