InterviewSolution
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InterviewSolution
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`|axxb|^(2)` बराबर हैA. `|{:(,a.a,a.b),(,b.a,b.b):}|`B. `|{:(,a.b,a.b),(,b.a,b.b):}|`C. `|{:(,b.a,a.a),(,a.b,b.b):}|`D. इनमे से कोई नहीं |
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Answer» Correct Answer - A `|a xxb|^(2) =(axxb) (axxb) ` ` " " =( |a||b|sin theta )hat n.(|a||b|sintheta )hat n ` ` " " =(|a|^(2)|b|^(2)sin ^(2) theta ) (hat n.hat n ) ` ` " " =|a|^(2) |b|^(2) sin ^(2) theta ` ` " " =|a|^(2)|b|^(2) (1-cos^(2)theta) ` `" " =|a|^(2)|b|^(2)-(|a||b|costheta)^(2) ` `" " =(a.a)(b.b)-(a.b)^(2)` `=|{:(,a.a,a.b),(,a.b,b.b):}|` |
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