Question: If C = {cos a, cos 2a, cos 3a} and S= {sin a, sin 2a, sin 3a} are equal sets then number of values

If C = {cos a, cos 2a, cos 3a} and S= {sin 

If C = {cos a, cos 2a, cos 3a} and S= {sin a, sin 2a, sin 3a} are equal sets then number of values a in (0, 27]is. Backspace 7 89 4 5 6 1 23

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