12std ch5 ex-5.5 (6)
A grassy lawn is in the shape of trapezium whose parallel sides are 25 m and 10 m. It's non parallel sides are 14 m and 13 m applying herons formula find the area of the lawn
Express (9.6, ‒12.4) as polar co-ordinates, correct to 2 decimal places, in both degrees and radians
Express (9.6, ‒12.4) as polar co-ordinates, correct to 2 decimal places, in both degrees and radians
1.3+3.5+5.7+...+(2n-1)(2n+1)=n(4n^2+6n-1)/3 use principle of mathematical induction