- #1

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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??

Thaks for your help.