Recent content by Fila

I had no idea how to write the two lines into those 3 equations to solve it. Now I know what to do. Thanks!

Sometimes its difficult to flip through many books to try and find what you are looking for. And when you find it, the book says a lot more than you need to read when you are in a hurry. Are there any math websites that gives good, clear, simple instructions to doing different types of...

Thanks! How do I get started with finding the point of intersection in #2? I couldn't find this 3 dimension problem in the book.

Nice site. It will be useful when I forget some integral rules

I have two questions I need to make sure if I'm doing correctly. Its vectors. 1) For what values of a are the vectors i+3j-k and i+aj+k i) inclined at 30 degree angle cos@ = n1.n2 / |n1||n2| cos^2(30) * 11(2+a^2) = ((3a)^2) a=sqrt22 ii) perpendicular (1,3,-1).(1,a,1)=0...