题目

Lost: A white watchI lost it in the morning. It’s very important for me. My name is Jane. My telephone number is 416-3592.Lost: A schoolbag It’s blue. There are two pens, three books and a notebook in it. I lost it on the way to school. My name is Sally. E-mail me at sally321@163.com.Found: A school uniform (校服)I found a school uniform on the playground this afternoon. It is blue and white. Is it yours? You can call me at 439-6175.Found: A dictionaryA red English-Chinese dictionary is in the school library. Is it yours? Please call Alan at 485-7700. 【1】If you find a white watch, it如图所示为某三角函数图象的一段． (1)用正弦函数写出其解析式； (2)求与这个函数关于直线x=2n对称的函数解析式．