China Naming Network - Feng Shui knowledge< - Seek the name lxy
Seek the name lxy
0
∫Lxyds=∫(0，π /2)(cos t )(2sint )d t？
=∫(0，π /2) sin 2t d t
=0
Curves that turn around are generally infinite in length and zero in area. At this time, the curve itself is a space larger than 1 smaller than 2 dimensions.
The steps to solve the curve equation are as follows:
(1) Establish an appropriate coordinate system, and use an ordered real number pair (x, y) to represent the coordinates of any point m on the curve;
(2) Write a set of suitable conditions p = {m | p (m)};
(3) the condition p(M) is expressed by coordinates, and the equation f (x, y) = 0 is listed;
(4) Simplified equation f(x, y) = 0;
(5) Verify (review) whether the obtained curve equation ensures purity and integrity.