Let `(1+tan1^(ul0))(1+tan2^(ul0))......(1+tan45^(ul0))=2^(k)` then `k` equal to

Let `(1+tan1^(ul0))(1+tan2^(ul0))......(1+tan45^(ul0))=2^(k)` then `k` equal to
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Let `(1+tan1^(ul0))(1+tan2^(ul0))......(1+tan45^(ul0))=2^(k)` then `k` equal to A. `21` B. `22` C. `23` D. `24`
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