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cosα+cosβ=a, sinα+sinβ=b and α-β = 2θ. If cos3θcosθ= K, when a=13,b=12Find the value of -36K. __ |
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Answer» cosα+cosβ=a, sinα+sinβ=b and α-β = 2θ. If cos3θcosθ= K, when a=13,b=12Find the value of -36K. |
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