how do i verify euler's formula

Question

tkhunny · Answer

Verify?  Pick a verifiable case and show that it works?

lovelyharmonics · Answer

euler's formula is 
=F+V=E+2 
F is for faces
V is for vertices  
E is for edges  
Faces are the flat surfaces. 
Edges are the lines that are formed in a polygon ( like lines in a rectangle,etc. ) 
Vertices are points joining these lines.

anonymous · Answer

no i have to show that cos x + i sin x + 1 = 0

lovelyharmonics · Answer

okay .-. i am no good at sin cos or tan so @campbell_st  come back please c:

campbell_st · Answer

well just pick a solid... 

say a square based pyramid... 

5 faces

5 vertices

and 8 edges... 

does that work in the formula... 

try it with a cube

6 faces

8 vertices

12 edges

see if it works

anonymous · Answer

i have gotten as far as cis x = -1

tkhunny · Answer

Try $x = \pi$