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Challenge · Challenge problem

What is the value of (1+tan⁡8∘)(1+tan⁡9∘)(1+tan⁡10∘)⋯(1+tan⁡37∘)(1 + \tan 8^\circ)(1 + \tan 9^\circ)(1 + \tan 10^\circ)\cdots(1 + \tan 37^\circ)?

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