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...