化简{2sin50°+cos10°(1+(√3)tan10°)}/√(1-(sin^2)5°)
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/18 01:13:21
化简{2sin50°+cos10°(1+(√3)tan10°)}/√(1-(sin^2)5°)
2(√2)
原式={2sin50°+cos10°+√3sin10°}/cos5°
={2sin50°+2[1/2cos10°+√3/2sin10°]}/cos5°
={2sin50°+2[sin30°cos10°+cos30°sin10°}/cos5°
={2sin50°+2sin(30°+10°)}/cos5°
=2{sin50°+sin40°}/cos5°
=2√2{√2/2sin50°+√2/2cos50°}/cos5°
=2√2{cos45°sin50°+sin45°cos50°}/cos5°
=2√2{sin(45°+50°)}/cos5°
=2√2sin95°/cos5°
=2√2cos5°/cos5°
=2√2
原式={2sin50°+cos10°+√3sin10°}/cos5°
={2sin50°+2[1/2cos10°+√3/2sin10°]}/cos5°
={2sin50°+2[sin30°cos10°+cos30°sin10°}/cos5°
={2sin50°+2sin(30°+10°)}/cos5°
=2{sin50°+sin40°}/cos5°
=2√2{√2/2sin50°+√2/2cos50°}/cos5°
=2√2{cos45°sin50°+sin45°cos50°}/cos5°
=2√2{sin(45°+50°)}/cos5°
=2√2sin95°/cos5°
=2√2cos5°/cos5°
=2√2
求值:(tan10°-√3)×cos10°/sin50°
(tan10°–√3)cos10°/sin50°
化简:cos10°(tan10°-根号3)/sin50°
2sin50°+cos10°(1+3tan10°)1+cos10°
化简(tan10°-根号3)*(cos10°/sin50°)*(2cos10°-sin20°/cos20°)
求值:2sin50°+cos10°*(1+根号3tan10°)/cs35°cos40°+cos50°cos55°
求值:2sin50°+sin80°(1+3tan10°)1+cos10°
化简:[2sin50°+sin10°(1+根号3*tan10°)]*根号sin^280°
化简:sin50°(1+√3tan10°)
1,{2sin50+cos10(1+√3tan10)}/√(1+cos10)=?
化简:(tan10°−3)•cos10°sin50°
求值:[2sin50°+sin10°(1+√3tan10°)]√(1-sin^2 10°)