由 J+W 於 星期日 十月 10, 2004 5:28 pm
coordinate Geometry2
1)A diameter of a circle with centre at the origin and
radius 8 units has inclination of120° .
Find the equations of the tangents to the circle at the
ends of the diameter.
2)The slope of a line is -3 and the distance of the line
from the origin is 10.Find the equation of the line.
3)The slope of a line is 3/4 and the distance of the
line from the origin is 12.Find the equation of the line.
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解析幾何 2 (Coordinate geometry 2 )
1)以原點為圓心,半徑長8單位的圓上的一條直徑,其方位角是120度(註1)
找出通過此直徑2端點(註2)的切線方程式
2)有一條直線,其斜率是-3,和原點的距離是10,找出其直線方程式?
3)有一條直線,其斜率是3/4,和原點的距離是12,找出其直線方程式?
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一些單字
diameter:直徑
centre:中心
radius:半徑
inclination:傾斜
tangent:正切 切線
slope:斜率
ends:結束,結尾
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(註1)原文並無方位角字眼,這段翻得沒什把握
(註2)2個端點是由end(s)來猜的