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If |veca+ vecb| lt | veca- vecb|, then t...

If `|veca+ vecb| lt | veca- vecb|`, then the angle between `veca and vecb` can lie in the interval

A

`(pi//2,pi//2)`

B

`(0,pi)`

C

`(pi//2,3pi//2)`

D

`(0,2pi)`

Text Solution

Verified by Experts

The correct Answer is:
C
`|a+b| lt |a-b|`
`implies (pi)/(2) lt theta lt (3pi)/(2)`.
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ARIHANT MATHS-VECTOR ALGEBRA-Exercise (Single Option Correct Type Questions)
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  13. find the term independent of x in the expansion of (2x-1/x)^2 ?

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  14. If veca and vecb are two unit vectors and theta is the angle between t...

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  15. A, B, C and D have position vectors veca, vecb, vecc and vecd, repecti...

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  16. if alpha and beta are the root of the quadratic polynomial f(x) = x^2-...

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  17. If a +b+c = alphad, b+c+d=beta a and a, b, c are non-coplanar, then t...

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