问题描述:
英文数学题 求答案及过程 急! 谢谢
A semicircle with centre O (the origin) and radius 5 units, meets Ox at A and B and the positive y-axirs at C.
1. State the coordinates of A,B and C.
2. If a point (x,y) lies one the sencircle, show that x的平方+y的平方=25.
3. Verify that the point p(-3,4) lies on the semicircle and show by using gradients that 角APB=90度.
A semicircle with centre O (the origin) and radius 5 units, meets Ox at A and B and the positive y-axirs at C.
1. State the coordinates of A,B and C.
2. If a point (x,y) lies one the sencircle, show that x的平方+y的平方=25.
3. Verify that the point p(-3,4) lies on the semicircle and show by using gradients that 角APB=90度.
问题解答:
我来补答展开全文阅读