Q. 13 E4.5( 11 Votes )

# In the following

Answer :

The eq. of the given planes are

4x + 8y + z – 8 = 0 and y + z – 4 = 0

Two planes are ⊥ if the direction ratio of the normal to the plane is

a_{1}a_{2} + b_{1}b_{2} + c_{1}c_{2} = 0

0 + 8 + 1

9 ≠ 0

∴ Both the planes are not ⊥ to each other.

Two planes are || to each other if the direction ratio of the normal to the plane is

∴ Both the planes are not || to each other.

The angle between them is given by

= 45^{0}

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