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Prove the Identity −tan⁡2x+sec⁡2x=sec⁡2xcos⁡2x- \tan ^ { 2 } x + \sec ^ { 2 } x = \sec ^ { 2 } x \cos ^ { 2 } x

Question 84

Essay

Prove the identity.
- −tan⁡2x+sec⁡2x=sec⁡2xcos⁡2x- \tan ^ { 2 } x + \sec ^ { 2 } x = \sec ^ { 2 } x \cos ^ { 2 } x

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