(cos75°+sin75°)(cos75°-sin75°)
来源:学生作业帮助网 编辑:六六作业网 时间:2025/01/31 18:11:57
(cos75°+sin75°)(cos75°-sin75°)(cos75°+sin75°)(cos75°-sin75°)(cos75°+sin75°)(cos75°-sin75°)(cos75°+si
(cos75°+sin75°)(cos75°-sin75°)
(cos75°+sin75°)(cos75°-sin75°)
(cos75°+sin75°)(cos75°-sin75°)
(cos75°+sin75°)(cos75°-sin75°)
=cos²75º-sin²75º
=cos150º
=cos(180º-30º)
=-cos30º
=-√3/2
(cos75°+sin75°)(cos75°-sin75°)
=(cos75)^2-(sin75)^2
=cos(2*75)
=cos150
=-cos30
=-根号3/2
(cos75°+sin75°)(cos75°-sin75°)
=cos150°
=-√3\2
(cos75°+sin75°)(cos75°-sin75°)
求值:(sin75°-cos75°)/(sin75°+cos75°)
化简:cos83°+sin75°sin8°/cos7°-cos75°cos82°
(sin75°-cos75°)分之(sin75°+cos75°)我要具体步骤 在线等
cos75°-sin75°除以 cos75°+ sin75°
化简(cos83度+sin75度*sin8度)/cos7度-cos75度*cos82度
Sin75°/Cos75°+Cos75°/Sin15°=?
Sin75°/Cos75°+Cos75°/Sin15°=?
计算,sin75°*cos75°=
计算:(cos75°+sin75°)乘(cos75°-sin75°)=
化简:sin75°cos75°是sin75°乘cos75°
(cos15°-cos75°)(sin75°+sin15°)怎么化简?
(cos15°-cos75°)(sin75°+sin15°)=?
sin15°cos75°+cos15°sin75°
sin15°cos75°+cos165°sin75°
+-根号(sin75°cos75°)=+-根号(sin150°/2)这步是为什么啊
根2/2(cos75°+sin75°)的值为
tan15°、tan75°sin15°、sin75°、cos15°cos75°具体数值