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If-a-sin-2-b-sin-cos-c-cos-2-1-2-a-c-1-2-k-then-k-2-is-equal-to-

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Question Number 42668 by bbnnftm833 last updated on 31/Aug/18
If ∣a sin^2 θ+b sin θ cos θ+c cos^2 θ−(1/2)(a−c)∣ ≤ (1/2) k, then k^2 is equal to
If∣asin2θ+bsinθcosθ+ccos2θ−12(a−c)∣⩽12k,thenk2isequalto

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