已知非零函数a.b满足:(asin(π/5)+bcos(π/5))/(acos(π/5)-bsin(π/5))=tan8π/5,求b/a的值

问题描述:

已知非零函数a.b满足:(asin(π/5)+bcos(π/5))/(acos(π/5)-bsin(π/5))=tan8π/5,求b/a的值

(asin(π/5)+bcos(π/5))/(acos(π/5)-bsin(π/5))=tan8π/5=tan3π/5=sin3π/5/cos3π/5asinπ/5cos3π/5+bcosπ/5cos3π/5=acosπ/5sin3π/5-bsinπ/5sin3π/5bcosπ/5cos3π/5+bsinπ/5sin3π/5=acosπ/5sin3π/5...