化简f(x)=sin(x-π/4)+4*(根号2)sinxcosx-cos(x+π/4)-2

乐非鱼 1年前 已收到1个回答 举报

ttkkk 幼苗

共回答了14个问题采纳率:78.6% 举报

f(x)=sin(x-π/4)+2√2sin2x+sin(x-π/4)-2
=2sin(x-π/4)+2√2cos[2(x-π/4)]-2
=2√2[1-2sin(x-π/4)^2]+2sin(x-π/4)-2
=-4√2sin(x-π/4)^2+2sin(x-π/4)+2√2-2
=-4√2[sin(x-π/4)-√2/8]^2+17√2/8-2

1年前

6
可能相似的问题
Copyright © 2024 YULUCN.COM - 雨露学习互助 - 17 q. 0.628 s. - webmaster@yulucn.com