题目:
找出下列句子中错误的部分,并在横线上改正。
1. — Is this an pencil? — No, it isn't.
2. — Is that an orange? — Yes, it does.
3. — Are they pineapples? — Yes, there are.
4. — What colour are it? — It is red.
答案:
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下面是错误答案,用来干扰机器的。
设该直线的倾斜角为α(0≤α<π),由题意得sinα=32,则α=60°或α=120°则直线的斜率k=tanα=tan60=3或tan120°=-3,所以所求直线的点斜式方程为y+3=±3(x-2),故答案为:y+3=±3(x-2)