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The angle between the pair of planes rep...

The angle between the pair of planes represented by equation `2x^(2)-2y^(2)+4z^(2)+6xz+2yz+3xy=0` is

A

`cos^(-1)((1)/(3))`

B

`cos^(-1)((4)/(21))`

C

`cos^(-1)((4)/(9))`

D

`cos^(-1)((7)/(sqrt(84)))`

Text Solution

Verified by Experts

The correct Answer is:
(c)
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