Adding Vectors: E1 + E2 = Ep (Angle = 60°)

[duchuy]

Homework Statement

Beginner vectorial calculations

Relevant Equations

Ep = E1 + E2

I have this relation that says :
vector Ep = vector E1 + vector E2.
Given the angle between the vector is equal to 60 deg and E1 = E2, I have to give the relation between Ep and E1.
I'm struggling to add the angle value in this, since vector Ep = 2 vector E1. But since this isn't equal to vE1. vE1, i don't see how i can continue..
Thank you so much for your help!

 

[FactChecker]

I assume that you mean that the LENGTH of E1 equals the LENGTH of E2, since they point in different directions and can not be equal vectors. In that case, I advise you to make a rough drawing of the two vectors, placed end-to-end at a 60-degree angle. That is what the sum is, beginning at the start of E1 and ending at the end of E2. Remember that the sum of the angles of a triangle is 180 degrees. You should be able to see the answer from that.

 

[duchuy]

Thank you sir!