\operatorname{cos}^2(A-B)+\operatorname{cos}^2B-2\operatorname{cos}(A- – InterviewSolution

1.	\operatorname{cos}^2(A-B)+\operatorname{cos}^2B-2\operatorname{cos}(A-B)\operatorname{cos}A\operatorname{cos}B
Answer» \operatorname{cos}^2(A-B)+\operatorname{cos}^2B-2\operatorname{cos}(A-B)\operatorname{cos}A\operatorname{cos}B

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