Question: Establish identity. |1 tan? 0 tan 0 + 1 = 2 cos? 0 1 + tan? 0

Establish identity.

|1 – tan? 0 tan 0 + 1 = 2 cos? 0 1 + tan? 0

|1 tan? 0 tan 0 + 1 = 2 cos? 0 1 + tan? 0

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