sin(-150°)cos(-210°)cos(-420°)/cos(-600°)sin(-1050°)化简求值。
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/03 08:52:53
sin(-150°)cos(-210°)cos(-420°)/cos(-600°)sin(-1050°)化简求值。
sin(-150°)cos(-210°)cos(-420°)/cos(-600°)sin(-1050°)
化简求值。
sin(-150°)cos(-210°)cos(-420°)/cos(-600°)sin(-1050°)化简求值。
原式=(-sin150)cos(-180-30)cos(-360-60)/cos(-720+120)sin(-1080+30)
=sin30cos30cos60/(-cos60)sin30
=-cos30
=-√3/2
sin(-150°)cos(-210°)cos(-420°)/cos(-600°)sin(-1050°)化简求值。
tan(-150°)cos(-210°)cos(-420°)tan(-600°)/sin(-1050°)
sin平方150°+sin平方135°-2sin平方210°+cos平方225°=?
cos(150°-a)+sin(a-105°)=?
化简cos(α+30°)cos(α-30°)-sin(α+30°)sin(α+150°),化简cos(α+30°)cos(α-30°)-sin(α+30°)sin(α+150°),
求2sin(-1110°)-sin960°+根号2cos(-225°)-cos(-210°)
tan(-150°)cos(-570°)cos(-1140°)/cot(-240°)sin(-690°)
求sin 135°+cos平方 150°+2sin210°cos平方 225°
sin平方120°+cos180°+tan45°-cos平方(-330°)+sin(-210°)
计算:sin(3π /4 ) +cos (2π /3) - sin 150° + cos135°=?
sin(10°)+sin(20°)cos(50°)求值
cos^15°-sin^15°=
sin(α+30°)-sin(α-30°)/cosα
sin^2 30°+cos()=1
计算:sin^67.5°-cos^67.5度
sin²15° 把sin变成带cos的
计算cosπ/3-tanπ/4+3/4tan²π/6-sinπ/6+cos²π/6cosπ/3-tanπ/4+3/4tan²π/6-sinπ/6+cos²π/6[tan(-150°)cos(-210°)cos420°]/cot(-600°)sin(-1050°)cos25/6π+cos25/3π+tan(-25/4π)5sinπ/2+2cos0-3sin3/2π+10cosπtan10°t
计算(1)cosπ/3-tanπ/4+3/4tan²π/6-sinπ/6+cos²π/6cosπ/3-tanπ/4+3/4tan²π/6-sinπ/6+cos²π/6[tan(-150°)cos(-210°)cos420°]/cot(-600°)sin(-1050°)cos25/6π+cos25/3π+tan(-25/4π)5sinπ/2+2cos0-3sin3/2π+10cosπt