发布网友 发布时间:2024-10-24 03:27
共3个回答
热心网友 时间:2024-11-10 01:48
热心网友 时间:2024-11-10 01:44
f(x)=4cosxsin(x+π/6)-1
=4cosx(√3/2sinx+1/2cosx)-1
=2√3sinxcosx+2cosxcosx-1
=√3sin2x+cos2x
=2sin(2x+π/6)
热心网友 时间:2024-11-10 01:46
f(x)=4cosx(sinx·√3/2+cosx·1/2)-1
=2√3sinxcosx+2cos^2x-1
=√3sin2x+cos2x-1
=2sin(2x+π/6)-1