Maths class 8 so easy​

Jack lives on a farm and has a large backyard. the area of his rectangular backyard is of a square mile. if the width of the yard is of a mile, what fraction of a mile is the length of the rectangular backyard?

Combine the information in the problem and the chart using the average balance method to solve the problem.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).