1.

If the angle between the vectors vecA and vecB is theta, the value of the product (vecB xx vecA) * vecA is equal to

Answer»

`BA^(2) COS THETA`
`BA^(2) sin theta `
`BA^(2) sin theta cos theta `
Zero

Solution :ANGLE between `vecB xx vecA and vecA ` is `90^(@)`
`(vecB xx vecA). vecA=|vecB xx vecA||vecA| cos 90^(@)`
`=0`


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