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问题: 2cos(2x+TT/4)=1,求x

解答:

cos(2x+TT/4)=1/2
2x+π/4=-2kπ-π/3,或2x+π/4=2kπ+π/3 k为整数
x=-kπ-7π/24,或x=kπ+π/24 k为整数