A:y=−4sin(π8x−π4)
B:y=4sin(π8x−π4)
C:y=−4sin(π8x+π4)
D:y=4sin(π8x+π4)
- I bought Collecting the Morning Flowers in the Evening, a book written by Lu Xun. Would you like to read __________?
- No, thanks. I have already bought __________.