asinπ/4-bcosπ/4=√2/2(a-b)为什么asinπ/4-bcosπ/4=√2/2(a-b)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/10/07 19:04:31
asinπ/4-bcosπ/4=√2/2(a-b)为什么asinπ/4-bcosπ/4=√2/2(a-b)asinπ/4-bcosπ/4=√2/2(a-b)为什么asinπ/4-bcosπ/4=√2/

asinπ/4-bcosπ/4=√2/2(a-b)为什么asinπ/4-bcosπ/4=√2/2(a-b)
asinπ/4-bcosπ/4=√2/2(a-b)
为什么asinπ/4-bcosπ/4=√2/2(a-b)

asinπ/4-bcosπ/4=√2/2(a-b)为什么asinπ/4-bcosπ/4=√2/2(a-b)
sin(π/4)=cos(π/4)=√2/2
所以 asinπ/4-bcosπ/4=√2/2(a-b)