Question

i
(il by use of component expansion.
3.Prove by the use of vectors that the diagonals of a rhombus with sides a and b are
perpendicular. The sides are of equal length
4. Prove that (a + b.la D) = 11/12 - 11619
A parallelogram has sides of length 7 and 4 units. Its diagonals have lengths 7 and 9 units
Find the angle between the diagonals.
[.​

Answer 1

you don't think your questions are too much (+_+)(+_+):-[:-[