# Spherical Coordinate Angles

1. Oct 8, 2008

### ricky_fusion

Hi guys,
This is my first time in this forum, thanks for your time.
Now, I learn about spherical angles (vektor) in 3 Dimension
I still confuse about the formula, such as:
Fx = F sinφ cosθ ( in X axis = i)
Fy = F sinφ sinθ ( in y axis = j)
Fz = F cosφ ( in z axis = k)

I want to send the pictures too, but I still don't have the way to upload it.Maybe next time.
Does anybody know about why in X axis there are sin and cos but in Z axis there is only cos??

2. Oct 8, 2008

### zoner7

You can calculate all these by playing around with right triangles... I only just learned this stuff 2 weeks ago, so I can hardly explain it in words. I would look around online for a detailed picture that explains how the equations are geometrically derived. it isn't too complicated.

3. Oct 9, 2008

### Staff: Mentor

Does this diagram help?

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4. Oct 9, 2008

### ricky_fusion

Hmm..
Yes, you are right, Thanks alot.