1=sin^x+cos^x
1+2sinxcosx=(sinx+cosx)^2
sinx+cosx
=√2(√2/2 sinx+cosx *√2/2)
=√2sin(x+π/4)
(sinx+cosx)^2
=2sin^(x+π/4)(公式cos2a=1-2sin^a)
=1-cos(2x+π/2)
f(x)= -cos(2x+π/2)+1
好了 具体自己去做了哈!
下面应该不是问题了吧!
1=sin^x+cos^x
1+2sinxcosx=(sinx+cosx)^2
sinx+cosx
=√2(√2/2 sinx+cosx *√2/2)
=√2sin(x+π/4)
(sinx+cosx)^2
=2sin^(x+π/4)(公式cos2a=1-2sin^a)
=1-cos(2x+π/2)
f(x)= -cos(2x+π/2)+1
好了 具体自己去做了哈!
下面应该不是问题了吧!