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  • Need solution for RD sharma maths class 12 chapter 24 vector or cross product Exercise Multiple choice questions question 17 maths textbook solution

Need solution for RD sharma maths class 12 chapter 24 vector or cross product Exercise Multiple choice questions question 17 maths textbook solution

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Answer: two

Given: \vec{a}=2 \hat{i}+\hat{j}+2 \hat{k} ; \vec{b}=\hat{j}+\hat{k}

Hint: You must know about unit vector perpendicular to the vectors                        

Explanation: \vec{a}=2 \hat{i}+\hat{j}+2 \hat{k} ; \vec{b}=\hat{j}+\hat{k}                                         

            Unit vector perpendicular to both \vec{a} & \vec{b}can              

           be drawn in two direction.    

                        i.e., upward or downward

                       i.e., \vec{a}\times \vec{b}and -\left ( \vec{a}\times \vec{b} \right )                                                                     

            \because No of vectors is two

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