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The logic followed here is: H Z C Z P E C PHZHC / ZCEPZ / PEEHC → Does not follow pattern. C E Z P H C Z PCEHZ / PCEHZ / PCEHZ → Follows pattern of PCEHZ. Z C H P Z C E PZCHH/PCEZZ/PCEHE → Does not follow pattern. E P Z C H E C PEPHZ/CCEHZ/PEEHC → Does not follow pattern. Hence, the correct answer is (B).
sin2 9 ° + sin2 10 ° + sin2 11 ° + sin2 12 ° + ……… + sin2 81 ° = ?
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Simplify the given equation: