Question
ove the ldentity.
cos x+
+ cos x-
= cosx
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 Butto
the right of the Rule.
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Transcribed Image Text

ove the ldentity. cos x+ + cos x- = cosx 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 Butto the right of the Rule.

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