Question
A train takes 2 hours less for a journey of 300 km if it's speed is increased by 5 km/h from its usual speed. Find the usual speed of the train
find the coordinates of the foot of perpendicular drawn from the origin to the plane 2x-y+3z-7=0
Maths
Jan. 13, 2019, 6:01 p.m.
Answer
if a b c are interior angles of triangle abc show that cos square (A/2) cos square (B C/2)=1