EPT
Its so awesome in linear algebra ^^
Physics Help (newb) - Page 2
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Zortch
Canada635 Posts
Its so awesome in linear algebra ^^ | ||
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fight_or_flight
United States3988 Posts
On August 13 2008 14:13 Zortch wrote: Dot product is god Its so awesome in linear algebra ^^ its the basis of fourier transforms which is the basis of all technology | ||
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Saracen
United States5139 Posts
On August 13 2008 14:13 Zortch wrote: Dot product is god Its so awesome in linear algebra ^^ you sure he doesn't need the proof for why if A(dot)B = 0, A and B are othogonal, though? ^^ | ||
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BottleAbuser
Korea (South)1888 Posts
Don't argue; I'm not open to reason right now. Nuh! Uh! Ah! Quiet! | ||
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Zortch
Canada635 Posts
On August 13 2008 14:20 Saracen wrote: you sure he doesn't need the proof for why if A(dot)B = 0, A and B are othogonal, though? ^^ Mmm, its not hard to not assume that though. If we have a*b=0 then |a||b|cos(%)=0 and since a and b are non-zero (by assumption) cos(%)=0, which implies that %=0 or 90. | ||
micronesia
United States24768 Posts
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BottleAbuser
Korea (South)1888 Posts
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BluzMan
Russian Federation4235 Posts
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micronesia
United States24768 Posts
On August 13 2008 18:30 BluzMan wrote: What the heck has this to do with physics? Most likely, he was assigned this work in preparation for a physics class. | ||
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KlaCkoN
Sweden1661 Posts
On August 13 2008 18:30 BluzMan wrote: What the heck has this to do with physics? Just because it's easy compared to say calculating the cross section of a radiative association reaction doesn't mean it's not physics :/ Just as if someone is asking for help with the equation 5*x=3*y, 10*x-5*y=30. He is still asking for help with maths just as much as if he was asking for help with a forier transform. | ||
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Maenander
Germany4926 Posts
On August 13 2008 19:09 KlaCkoN wrote: Just because it's easy compared to say calculating the cross section of a radiative association reaction doesn't mean it's not physics :/ Just as if someone is asking for help with the equation 5*x=3*y, 10*x-5*y=30. He is still asking for help with maths just as much as if he was asking for help with a forier transform. What he meant is that it´s not physics but mathematics  | ||
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XCetron
5226 Posts
![[image loading]](http://animals.nationalgeographic.com/staticfiles/NGS/Shared/StaticFiles/animals/images/primary/african-elephant2.jpg) | ||
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Frits
11782 Posts
On August 13 2008 18:30 BluzMan wrote: What the heck has this to do with physics? This stuff is pretty standard when learning about and understanding how a force pulls on ropes etc, how vectors work etc. I had this stuff too in the lower high school classes. Anyway just use sin/cos/tan to split the arrows into horizontal and vertical vectors and then it's just a case of substracting and drawing the remaining vector. | ||
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BluzMan
Russian Federation4235 Posts
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