help please! Establish the identity. cos 2theta(1 + tan 2theta) = 1 Which of the

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help please!

Establish the identity. cos 2theta(1 + tan 2theta) = 1 Which of the following shows the key steps in establishing the identity? cos 2theta(1 + tan 2theta) = cos 2theta cot 2theta = cos 2theta 1/tan 2theta =cos 2theta/cos2theta=1 cos 2theta(l + tan 2theta) = cos 2theta sec 2theta = cos 2theta=1/CSC 2theta= cos 2theta/cos 2theta cos 2theta(1 + tan 2theta) = sin 2theta + sin 2thetacos2theta/sin2theta= cos 2theta + sin 2theta = 1 cos 2theta(1 - tan 2theta) = cos 2theta + cos 2theta tan 2theta = cos 2theta + sin 2theta = 1

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D

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