Prove the identity. sin (x+y) cosx-cos (x+y) sinx = siny Note that each Statement must be based on a Rule chosen from the Rule menu. To see a detailed description of a Rule, the right of the Rule. Statement sin (x + y) cosx- cos(x + y) sinx Validate This line is incorrect. Rule Double-angle 0.0 cos sin cot 2 Olo X can seccsc 5

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