如何化简f(x)=2sinxcosx+cos2x-1

2025-06-20 10:49:18
推荐回答(1个)
回答1:

解f(x)=2sinxcosx+cos2x-1
=sin2x+cos2x-1
=√2(√2/2sin2x+√2/2cos2x)-1
=√2sin(2x+π/4)-1