“微信扫一扫”进入题库练习及模拟考试
已知函数
A.\(y=4\sin {\left ( {\frac {1} {2}x+\frac {3\pi } {4}} \right )}\)
B.\(y=4\sin {\left ( {\frac {1} {2}x+\frac {5\pi } {4}} \right )}\)
C.\(y=4\sin {\left ( {2x+\frac {3\pi } {4}} \right )}\)
D.\(y=4\sin {\left ( {2x+\frac {5\pi } {4}} \right )}\)
参考答案:B