已知sin(5π-α)=根号2×cos[(2÷7)+β]和根号3×cos(-α)=根号2×cos(π+α),且0<α<π,0<β<π,求α和β的值.不好意思,打错了。已知sin(5π-α)=根号2×cos[(2÷7)+β]和根号3×cos(-α)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 14:03:59
![已知sin(5π-α)=根号2×cos[(2÷7)+β]和根号3×cos(-α)=根号2×cos(π+α),且0<α<π,0<β<π,求α和β的值.不好意思,打错了。已知sin(5π-α)=根号2×cos[(2÷7)+β]和根号3×cos(-α)](/uploads/image/z/1105192-64-2.jpg?t=%E5%B7%B2%E7%9F%A5sin%EF%BC%885%CF%80-%CE%B1%EF%BC%89%EF%BC%9D%E6%A0%B9%E5%8F%B72%C3%97cos%5B%282%C3%B77%EF%BC%89%EF%BC%8B%CE%B2%5D%E5%92%8C%E6%A0%B9%E5%8F%B73%C3%97cos%EF%BC%88-%CE%B1%EF%BC%89%EF%BC%9D%E6%A0%B9%E5%8F%B72%C3%97cos%EF%BC%88%CF%80%EF%BC%8B%CE%B1%EF%BC%89%2C%E4%B8%940%EF%BC%9C%CE%B1%EF%BC%9C%CF%80%2C0%EF%BC%9C%CE%B2%EF%BC%9C%CF%80%2C%E6%B1%82%CE%B1%E5%92%8C%CE%B2%E7%9A%84%E5%80%BC.%E4%B8%8D%E5%A5%BD%E6%84%8F%E6%80%9D%EF%BC%8C%E6%89%93%E9%94%99%E4%BA%86%E3%80%82%E5%B7%B2%E7%9F%A5sin%EF%BC%885%CF%80-%CE%B1%EF%BC%89%EF%BC%9D%E6%A0%B9%E5%8F%B72%C3%97cos%5B%282%C3%B77%EF%BC%89%EF%BC%8B%CE%B2%5D%E5%92%8C%E6%A0%B9%E5%8F%B73%C3%97cos%EF%BC%88-%CE%B1%EF%BC%89)
已知sin(5π-α)=根号2×cos[(2÷7)+β]和根号3×cos(-α)=根号2×cos(π+α),且0<α<π,0<β<π,求α和β的值.不好意思,打错了。已知sin(5π-α)=根号2×cos[(2÷7)+β]和根号3×cos(-α)
已知sin(5π-α)=根号2×cos[(2÷7)+β]和根号3×cos(-α)=根号2×cos(π+α),且0<α<π,0<β<π,求α和β的值.
不好意思,打错了。已知sin(5π-α)=根号2×cos[(2÷7)+β]和根号3×cos(-α)=根号2×cos(π+β),且0<α<π,0<β<π,求α和β的值。
已知sin(5π-α)=根号2×cos[(2÷7)+β]和根号3×cos(-α)=根号2×cos(π+α),且0<α<π,0<β<π,求α和β的值.不好意思,打错了。已知sin(5π-α)=根号2×cos[(2÷7)+β]和根号3×cos(-α)
条件错了吧
这道题的第二个条件你是不是没说清楚啊。。cos(π+α)=-cosα,cos(-α)=cosα,两边约去就明显不对嘛。。
.................................................
你确定题目没问题么?
、兰同学不懂问我噻……晕死咧