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Question 1 of 21

Mathematics > trigonometry > Trigonometric Functions And Identities

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Question 1

Let cos⁡(α+β)=45\cos(\alpha+\beta)=\frac{4}{5} and sin⁡(α−β)=513\sin(\alpha-\beta)=\frac{5}{13}, where 0≤α,β≤π40\le\alpha,\beta\le\frac{\pi}{4}. Then tan⁡2α=\tan 2\alpha=

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