how do we get from this line(adsbygoogle = window.adsbygoogle || []).push({});

||d(x,y,z)/d(p,q,r)||= ||sin(q)cos(r), pcos(q)cos(r), -psin(q)sin(r) end of line 1

line 2 sin(q)sin(r), pcos(q)sin(r), psin(q)cos(r) end of line 2

line 3 cos(q), -psin(q), 0||

to the next line where we take out cos(q) to get cos(q)||pcos(q)cos(r), -sin(q)sin(r) end of line 1

line 2 pcos(q)sin(r), psin(q)cos(r)||

i thought to take out a factor like taht you needed a line or a row of zeros where as here we dont have that?

Edit:read it wrong it has -(-psin(q)) of a different matrix after this so i'm guessing all they have done is swaped row 1 and 3 to make things easier, are there any restrictions to row swaping? and i'm guessing you cant column swap at all

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# Homework Help: Jacobian question

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