Mathematics

Mathematics

Problem

Which one of the following pairs represents the same angle measure? a) 60∘,  π260^{\circ},\;\dfrac{\pi}{2} b) 120∘,  2π3120^{\circ},\;\dfrac{2\pi}{3} c) 45∘,  π645^{\circ},\;\dfrac{\pi}{6} d) 90∘,  π90^{\circ},\;\pi

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