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  • Need solution for rd sharma maths class 12 chapter 24 vector or cross product Exercises Multiple choice questions question 10 maths textbook solution

Need solution for rd sharma maths class 12 chapter 24 vector or cross product Exercises Multiple choice questions question 10 maths textbook solution

Answers (1)

Answer: \hat{i}.\hat{i}=1 

Given: \hat{i},\hat{j},\hat{k} are unit vectors

Hint: Check all the options

Explanation:

  1. \hat{i}.\hat{j}=1 which is wrong \because \hat{i}.\hat{j}=0
  2. \hat{i}.\hat{i}=1which is true
  3. \hat{i}\times \hat{j}=1which is wrong \because \hat{i}\times \hat{j}=\hat{k}
  4. \hat{i}\times \left ( \hat{j}\times \hat{k} \right )=1which is wrong

                     \because \hat{i}\times \left ( \hat{-i} \right )=0

 

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