求求下列各式的值 （1）sin^262°+tan54°tan45°tan36°+sin^28° （2）tan1°tan2°tan3°……tan89°

（1）sin^2(62°)+tan54°tan45°tan36°+sin^2(28° )= sin^2(62°) + tan54°tan45°tan(90°-54°)+sin^2(90°-62° )= sin^2(62°) + tan54°tan45° cot54° + cos^2(62° )= sin^2(62°) + cos^2(62° )+ tan5...