If `F_(1) and F_(2)` aare two vectors of equal magniudes F such that `|F_(1).F_(2)|= |F_(1)xxF_(2)|, "then"|F_(1) +F_(2)|` equals toA. `sqrt((2+sqrt(2)))F`B. `2F`C. `Fsqrt(2)`D. None of these

If `F_(1) and F_(2)` aare two vectors of equal magniudes F such that `

1.	If `F_(1) and F_(2)` aare two vectors of equal magniudes F such that `\|F_(1).F_(2)\|= \|F_(1)xxF_(2)\|, "then"\|F_(1) +F_(2)\|` equals toA. `sqrt((2+sqrt(2)))F`B. `2F`C. `Fsqrt(2)`D. None of these
Answer» Correct Answer - A (a) `F.F.costheta =F.F sin theta `or tantheta `=1or theta=45^(@)` `\|F_(1).F_(2)\|=sqrt(F^(2)+F^(2)+2,FFcos 45^(@))` `(sqrt(2+sqrt(2)))F`

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If `F_(1) and F_(2)` aare two vectors of equal magniudes F such that `|F_(1).F_(2)|= |F_(1)xxF_(2)|, "then"|F_(1) +F_(2)|` equals toA. `sqrt((2+sqrt(2)))F`B. `2F`C. `Fsqrt(2)`D. None of these

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