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Let bar a,bar b,bar c be three non-copl...

Let `bar a,bar b,bar c` be three non-coplanar vectors and `bar d` be a non-zero vector, which is perpendicularto `bar a+bar b+bar c`. Now, if `bar d= (sin x)(bar a xx bar b) + (cos y)(bar b xx bar c) + 2(bar c xx bar a)` then minimum value of `x^2+y^2` is equal to

A

`pi^(2)`

B

`(pi^(2))/(2)`

C

`(pi^(2))/(4)`

D

`(5pi^(2))/(4)`

Text Solution

Verified by Experts

The correct Answer is:
D
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  19. Let A be vector parallel to line of intersection of planes P1 and P2. ...

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