Physics, asked by priyarathore431431, 9 months ago

Find A×B , if A=2i-j+k and B= 7i+2j-3k​

Answers

Answered by gdeep9275
0

Answer:

A×B=

 |i \:  \: \:  \:  \:  \:  \:  \:  j \:  \:  \:  \:  \:  \:  \:  \:  \: k |  \\  |2 \:  - 1 \:  \: \:  \:  \:  \:  \:  \:  \:  \:  1|  \\  |7 \:  \: \:  \:  \:  \:  2 \:  \:   \:  \:  \: - 3|

=i(-1×(-3)-2)-j(2(-3)-7)+k(4-7)

= -5i+10j-3k

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