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Mathematics, 17.10.2019 04:30, rissa8227
If alpha and beta be 2 distinct roots satisfying equation a cos theta+bsin theta=c, show that cos (alpha+beta)=(a^2-b^2)/(a^2+b^2)
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If alpha and beta be 2 distinct roots satisfying equation a cos theta+bsin theta=c, show that cos (a...
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