(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Vector A=(0i+3j), vector B=(8i+-1j), vector C=(-8i+5j) Use the component method to determine the following:

1. the magnitude and direction of Vector D=Vector A+vector B+vector C

2. vectorE=-A-B+C

2. Relevant equations

3. The attempt at a solution

1. magnitude D=A+B+C=square root (0+8+-8)^2+(3+-1+5)^2=9

direction=tan-1(3-1+5/0+8-8) this won't work because I am dividing by zero, but I'm not sure what it would be.

2. Magnitude -A-B+C=square root (-0-8+-8)^2+(-3--1+5)^2=2.65

direction=tan-1(3+-1+5/0+8-8)=undefined

Could someone please show me what I'm doing wrong?

Thank you very much

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: 3 vectors

**Physics Forums | Science Articles, Homework Help, Discussion**