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If a=cosα+isinα, b=cosβ+isinβ, c=cosγ+isinγ and bc+ca+ab=1,Then cos(β-γ)+cos(γ-α)+cos(α-β) is equal to |
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Answer» If a=cosα+isinα, b=cosβ+isinβ, c=cosγ+isinγ and bc+ca+ab=1,Then cos(β-γ)+cos(γ-α)+cos(α-β) is equal to
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