Find Cartesian Equation of Line: (x,y)=(4,-6) + t(8,2)

  • Thread starter Thread starter thomasrules
  • Start date Start date
  • Tags Tags
    Cartesian
AI Thread Summary
To find the Cartesian equation of the line given by (x,y)=(4,-6) + t(8,2), the parameter t can be eliminated to derive the equation. The slope of the line is 1/4, derived from the direction vector (8,2). By using the point (4,-6) and the slope, the Cartesian equation can be formulated as y + 6 = (1/4)(x - 4). The discussion also notes that this type of question might be more appropriate for a help section. Understanding the relationship between the parameterized form and the Cartesian equation is key to solving such problems.
thomasrules
Messages
243
Reaction score
0
Find the Cartesian equation of each of the following lines.

(x,y)=(4,-6) + t(8,2)

Not sure how to do it, I know that you need the normal which is (-2,8)

I've tried a lot of times and I don't get it
 
Mathematics news on Phys.org
You just have to eliminate the parameter t or you can just use the information you can immediately derive from this equation (i.e. its slope and a point it goes through) to set-up the cartesian equation.

Shouldn't this be posted in the help section?
 
Thread 'Video on imaginary numbers and some queries'
Hi, I was watching the following video. I found some points confusing. Could you please help me to understand the gaps? Thanks, in advance! Question 1: Around 4:22, the video says the following. So for those mathematicians, negative numbers didn't exist. You could subtract, that is find the difference between two positive quantities, but you couldn't have a negative answer or negative coefficients. Mathematicians were so averse to negative numbers that there was no single quadratic...
Thread 'Unit Circle Double Angle Derivations'
Here I made a terrible mistake of assuming this to be an equilateral triangle and set 2sinx=1 => x=pi/6. Although this did derive the double angle formulas it also led into a terrible mess trying to find all the combinations of sides. I must have been tired and just assumed 6x=180 and 2sinx=1. By that time, I was so mindset that I nearly scolded a person for even saying 90-x. I wonder if this is a case of biased observation that seeks to dis credit me like Jesus of Nazareth since in reality...
Thread 'Imaginary Pythagoras'
I posted this in the Lame Math thread, but it's got me thinking. Is there any validity to this? Or is it really just a mathematical trick? Naively, I see that i2 + plus 12 does equal zero2. But does this have a meaning? I know one can treat the imaginary number line as just another axis like the reals, but does that mean this does represent a triangle in the complex plane with a hypotenuse of length zero? Ibix offered a rendering of the diagram using what I assume is matrix* notation...
Back
Top