2sin130°+sin100°（1+√3tan370°）=2sin50°+cos10°(1+√3tan10°)=2sin50°+(cos10°+√3sin10°)=2sin50°+2sin(10°+30°)=2sin50°+2cos50°=2√2sin(50°+45°)=2√2cos5°又1+cos10°=2（cos5°）^2 ∴√(...
请帮我把下面的这题解决一下 关于Sin cos tan 的
2sin130°+sin100°（1+√3tan370°）=2sin50°+cos10°(1+√3tan10°)=2sin50°+(cos10°+√3sin10°)=2sin50°+2sin(10°+30°)=2sin50°+2cos50°=2√2sin(50°+45°)=2√2cos5°又1+cos10°=2（cos5°）^2 ∴√(...