The value of , for which the four points are coplanar, is |

The value of , for which the four points are coplanar, is |

1 Answer

127 votes

Let ….(i)

….(ii)

…(iii)

…..(iv)

From Eq. (i) and (ii), we get

From Eq. (i) and (iii), we get

Similarly, from Eqs.(i) and (iv), we get

Now, using condition of coplanarity

Applying , we get

127 votes

127