Chemistry, 15.11.2020 18:00 20170020

Verifying identity plz helpp!
cos(x+y) + cos(x-y) = 2cosx cosy

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Verifying identity plz helpp!
cos(x+y) + cos(x-y) = 2cosx cosy...

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Verifying identity plz helpp!cos(x+y) + cos(x-y) = 2cosx cosy

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Verifying identity plz helpp!
cos(x+y) + cos(x-y) = 2cosx cosy