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If vec a= hat i-\ hat j+7 hat k and v...

If ` vec a= hat i-\ hat j+7 hat k` and ` vec b=5 hat i-\ hat j+lambda hat k` , then find the value of `lambda,` so that ` vec a+ vec b` and ` vec a- vec b` are perpendicular vectors.

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If vec p=5 hat i+lambda hat j-3 hat k and vec q= hat i+3 hat j-5 hat k , then find the value of lambda , so that vec p+ vec q and vec p- vec q are perpendicular vectors.

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Find | vec axx vec b| , if vec a= hat i-7 hat j+7 hat k and vec b=3 hat i-2 hat j+2 hat k

XII BOARD PREVIOUS YEAR PAPER ENGLISH-BOARD PAPER SOLUTIONS-All Questions
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