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Challenge · Challenge problem

What is the value of (1+tan⁡11∘)(1+tan⁡12∘)(1+tan⁡13∘)⋯(1+tan⁡34∘)(1 + \tan 11^\circ)(1 + \tan 12^\circ)(1 + \tan 13^\circ)\cdots(1 + \tan 34^\circ)?

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