Grade 12 University: Algebraic vectors help

Imming
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Hi everyone!
1. Homework Statement

α=90°
β=31°
\gamma=121°

2. Homework Equations
I need to determine the magnitude of one of the sides?



3. The Attempt at a Solution




I don't understand how to solve for the magnitude.
 
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One of the sides of what? What are these angles of?

Note that there is a template suggested when you make a new thread which I'll repost here:

Homework Statement


Homework Equations


The Attempt at a Solution


This is suggested for a reason, following it allows us to help you far more efficiently
 

Thread 'Finding the nth roots of a complex number'

There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
View full post »

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