若角α的终边经过点P（1，-2），则tan2α的值为（ ）。 发布时间：2017-04-19 13:13 │ 来源：www.tikuol.com 题型：填空题 问题： 若角α的终边经过点P（1，-2），则tan2α的值为（ ）。
题型：填空题 选用方框中短语动词的适当形式填空，每个只能用一次。Run out of, cheer …up, set up, clean up,take away, write down,call up, come up with, give in, take offl. The plane ______ on time in spite of fog2. Wait a minute, I'II______ your telephone number.3. After the party, they have to______ the room．4. He looks sad. Let's______ him______ .5. He has______ his money, so he has to ask for some from his parents.6. Tomorrow is her birthday. She is______ all her good friends to come to her birthday party now.7.They decide to______ a new school in that village.8. Can you______ a good idea about the activity?9. She's a brave player; she never______.10. The books must not be______ from the library. 查看答案