3根号15sinx加3根号5cosx怎么化简

2025-01-01 04:53:05
推荐回答(1个)
回答1:

解:原式=3√15sinx+3√5coss
=3√5*(√3sinx+cosx)
=3√5*√(3+1)*sin(s+π/6)
=6√5sin(x+π/6)