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For any four points O(0,0,0),P(1,2,1),Q(...

For any four points `O(0,0,0),P(1,2,1),Q(2,3,0),R(0,1,-1)`,
the angle between the planes `OPQ` and `PQR` is

A

(a) `cos^(-1)((5)/(sqrt(28)))`

B

(b) `sin^(-1)((5)/(sqrt(28)))`

C

(c) `cos^(-1)((5)/(sqrt(14)))`

D

(d) `sin^(-1)((5)/(sqrt(14)))`

Text Solution

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The correct Answer is:
A
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