234国道（234tan）
2025-10-10
1、sin2242°+tan2(-234°)cot405°tan1044°+sin2748°=sin262°+tan254°cot45°tan(-36°)+sin228°=cos228°+sin228°-tan54°cot45°cot36°tan36°=1-tan54°sin2242°+tan2(-405°)cot234°tan1044°+sin2748°=sin262°+tan245°cot54...
2025-10-10
1、sin2242°+tan2(-234°)cot405°tan1044°+sin2748°=sin262°+tan254°cot45°tan(-36°)+sin228°=cos228°+sin228°-tan54°cot45°cot36°tan36°=1-tan54°sin2242°+tan2(-405°)cot234°tan1044°+sin2748°=sin262°+tan245°cot54...