Q 2 and 3

# Doubt from Tetrahedron

1 Like

1 Like

Please anyone try Q3

@Hari_Shankar Sir, @Jagdish_Singh Sir please see Q 3

Also find mistake in my approach

My approach - A' = A cos@ as we have to take projection at angle @ and same for B' and C'.

Now I have applied the formula of volume of tetrahedron to the vectors AB', B'C' and C'D' and similarly for the A'BCD Tetrahedron but i am unable to get the answer!!!

I am getting answer as \displaystyle \frac{V_{AB'C'D'}}{V_{A'BCD}} = \cos \alpha.

Ans is given 1 but sir please share your approach