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Challenge · Challenge problem

What is the value of (1+tan⁡3∘)(1+tan⁡4∘)(1+tan⁡5∘)⋯(1+tan⁡42∘)(1 + \tan 3^\circ)(1 + \tan 4^\circ)(1 + \tan 5^\circ)\cdots(1 + \tan 42^\circ)?

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