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The acute angle between the two planes ...

The acute angle between the two planes ` x + y + 2z`
= 3 and 3x - 2y + 2z = 7 ` is …….

A

` sin^(-1) ((5)/(sqrt(102)))`

B

` cos^(-1) ((5)/(sqrt(102)))`

C

` sin^(-1) ((15)/(sqrt(102)))`

D

` cos^(-1) ((15)/(sqrt(102)))`

Text Solution

Verified by Experts

The correct Answer is:
b
`cos^(-1) ((5)/(sqrt(102)))`
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