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Select the Rule Prove the identity.

`sin(x+y)-sin(x-y)=2cosxsiny`

Note that each Statement must be based on a RL the right of the Rule. Prove the identity.

`sin(x+y)-sin(x-y)=2cosxsiny`

Note that each Statement must be based on a Rule chosen from the Rule menu. To see a detailed description of a Rule, select the More Information Button to the right of the Rule. Statement Rule

`sin(x+y)-sin(x-y)`

`?`

`(?)/(?)`

`?^(?)`

`cos?`

`?sin?`

`?tan?`

`=`

Select Rule