1-cos2x+sin2x=
问题描述:
1-cos2x+sin2x=
答
原式=√2(√2/2sin2x +√2/2cos2x)+1=√2sin(2x-π/4)+1
答
1+根号2sin(2x-π/4)
答
原式=sin2x-cos2x+1
=√2(√2/2*sin2x-√2/2cos2x)+1
=√2(sin2xcosπ/4-cos2xsinπ/4)+1
=√2sin(2x-π/4) +1