The angular between two planes x+2y+2z=3...

The angular between two planes `x+2y+2z=3` and `-5x+3y+4z=9` is

A

`cos^(-1)((3sqrt(2))/(10))`

B

`cos^(-1)((19sqrt(2))/(30))`

C

`cos^(-1)((9sqrt(2))/(20))`

D

`cos^(-1)((3sqrt(2))/(5))`

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The correct Answer is:

A

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