Math Question: Given triangle ABC with sides AB = 5cm, BC = 6cm, and AC = 7cm, find another triangle DEF with sides DE = 7cm, EF = 5cm, and FD = 6cm. Are triangles ABC and DEF equal?
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What is the value in degrees of π/4 radians?
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What is the value of arctan(1.345) - arcsin(0.567)?