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?
=
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