Question

!!!数学!!! P^2=4cos2ø 面积a的定积分表达式？

数学很难。pls help me with this one lads, asap

Answer 1

Maths is not hard, it depends on how much effort you've put on it. Every subject is the same.

这是个双纽线图形，打横的8字，关于两条轴都对称，所以只需要求第一象限部分

For general form，the area of r^2 = a^2*cos(2θ) is a^2

答案在图片上，点击可放大。希望你满意，请及时采纳，谢谢☆⌒_⌒☆