1.

Assertion : The direction of a zero (null) vector is indeteminate. Reason : We can have `vecAxx vecB = vecA *vecB` with `vecA ne vec0 and vecB ne vec0`.A. If both Assertion `&` Reason are True `&` the Reason is a correct explanation of the Assertion.B. If both Assertion `&` Reason are True but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is False.D. If both Assertion `&` Reason are false.

Answer» Correct Answer - C
`A=sqrt(A_(x^(2))+A_(y^(2)))=sqrt((24)^(2)+(7)^(2))=25`
`|vecAxxvecB|^(2)+|vecA.vecB|^(2)=AB(sin^(2)theta+cos^(2)theta)=AB`
as `A=B=1rArr|vecAxxvecB|^(2)+|vecA.vecB|^(2)=1`


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