Question

|a| =13 |b|= 5 a.b=60 find|a×b|

Answer 1

Step-by-step explanation:

a.b=|a||b|cos theta

60=13*5 * cos theta

60/65=cos theta

12/13=cos theta

sin theta=5/13

axb=|a||b|sin theta

=13*5*5/13

=25