Recent content by Brains_Tom

Here's the evil question: Let X~Exponential(alpha). Derive and name the pdf of Y=(alpha)X

But what do i use for the angle, do i presume sin(theta) is just one, then just multiply the magnitudes, surely that would just give a numeric answer, when i am after a vector, i do understand that my two answers will be the same vector just opposite sign though.

SORRY - EDIT 1) Use the vector product to find two unit vectors that are orthogonal to both 'a' and 'b'? a=2i-5j+3k b=-i+j+k 2)How can the vector product be used to show an expression for the area of a triangle using the below co-ordinates? (2,0,1) (3,1,7) (-2,5,5) Find the area by...

1) But i get mod(a) x mod(b) = sqrt(114) and mod(axb) = sqrt(38) ?

I know what the vector product is mate i just don't know how to answer the question, as for 2, can you clarify, how do i put this into three dimensions for an actual result?

Hi folks first post, i am a 20yr old student from north-west england, hope you guys can help me and i can return the favour some time. 1) How can the vector product be used to show two vectors are orthogonal to each other? a=2i-5j+3k b=-i+j+k 2)How can the vector product be used to show...