sin22°cos8°+cos22°sin8°
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/13 09:25:36
sin22°cos8°+cos22°sin8°
计算题
计算题
![sin22°cos8°+cos22°sin8°](/uploads/image/z/19933728-24-8.jpg?t=sin22%C2%B0cos8%C2%B0%2Bcos22%C2%B0sin8%C2%B0)
sin22°cos8°+cos22°sin8°
=sin(22°+8°)=sin(30)=1/2
=sin(22°+8°)=sin(30)=1/2
1.sin7°+cos15°sin8°/cos7°-sin15°cos8°=
(sin7°+cos15°cos8°)/(sin7°-sin15°sin8°)的化简
关于三角函数的计算题(sin8°+sin7°cos15°)÷(cos8°-sin7°sin15°)=?
求(sin8°+sin7°cos15°)/(cos8°-sin7°sin15°)的值
化简(cos⁴7°30′-sin⁴7°30′)(sin23°cos8°-sin67°sin8°)
化简COS8°-SIN17°SIN9°/COS9°
计算:sin21°+sin22°+sin23°+…+sin287°+sin288°+sin289°.
sin8*cos8判断此三角函数值得符号
sin22度30分*cos22度30分=?
计算:sin21°+sin22°+sin23°+…+sin288°+sin289°+sin290°= ___ .
化简:cos21°+cos22°+cos23°+…+cos289°.
2根号下(1+sin8)-根号下(2cos8+2)