2cos(3x+π/4)-根号2=0
问题描述:
2cos(3x+π/4)-根号2=0
答
cos(3x+π/4)=√2/2
所以3x+π/4=2kπ±π/4
3x=2kπ-π/2.3x=2kπ
x=2kπ/3-π/6,x=2kπ/3