(3/8)-1/2[cos(2x)]+1/8[cos(4x)]我解出来是（sinx）^4可是我书上的笔记是sin（4x）,到底的多少啊·····

Question

(3/8)-1/2[cos(2x)]+1/8[cos(4x)] 我解出来是（sinx）^4 可是我书上的笔记是sin（4x）,到底的多少啊·····

Answer 1

sin(x）^4