polar form of 1
Question
DABC is a tetrahedron and ABC is an equilateral triangle and AB = BC = CA = 2a.Given that DA = DB= DC and the distance to the plane ABC from D is 3a. Find the angle between i. DA and ABC face
DABC is a tetrahedron and ABC is an equilateral triangle and AB = BC = CA = 2a.Given that DA = DB= DC and the distance to the plane ABC from D is 3a. Find the angle between i. DA and ABC face
Maths
Nov. 14, 2018, 1:37 p.m.
Answer
Water flow out through a circular pipe whose internal radius is 1 cm at the rate of 80cm into an empty cylindrical tank the radius of whose base is 40 cm. By how much will the level of water rise in the tank in half an hour.
Maths
Nov. 14, 2018, 11:44 a.m.
Answer
Two poles of height a metres and b metres are p metres apart. Prove that the height h drawn from the point of intersection N of the lines joining the top of each pole to the foot of the opposite pole is ab÷a b metres