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                                    Let a=a_(1) hati+a_(2) hatj+a_(3) hatk Assertion (A) The identity |veca xx hati|^(2)+|veca xx hatj|^(2)+|veca xx hatk|^(2)=2|veca|^(2) holds for veca. Reason (R) veca xx hati=a_(3)hatj-a_(2) hatk, vec a xx hatj=a_(1) hatk-a_(3) hati, veca xx hatk=a_(2) hati-a_(1)hatj | 
                            
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Answer»  Both A and R are true and R is the CORRECT EXPLANATION of (A)  | 
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