Question: 5. Problem: If cos a + cos + cos y = 0 = cos a + cos + cos y sin a + sin

5. Problem: If cos a + cos + cos y = 0

5. Problem: If cos a + cos + cos y = 0 = cos a + cos + cos y sin a + sin + sin y, Prove that = 39 2 = sin a + sin + sin Y.

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