- #1
XYZ313
- 21
- 0
we know that for any (x, y) in Cartesian system, there is such (r, θ) in Polar system, so
x = r * cosθ and
y = r * sinθ
how you can calculate what corresponds to (Δx, Δy) in polar system?
how come Δx * Δy = r * Δr * Δθ?
Maybe this is very stupid question and has obvious answer, but I haven't been practicing higher math since the university (8 years since graduation), but now I need this proof to prove that for normal distribution the sum of all probabilities in (-∞; ∞) equals to 1.
x = r * cosθ and
y = r * sinθ
how you can calculate what corresponds to (Δx, Δy) in polar system?
how come Δx * Δy = r * Δr * Δθ?
Maybe this is very stupid question and has obvious answer, but I haven't been practicing higher math since the university (8 years since graduation), but now I need this proof to prove that for normal distribution the sum of all probabilities in (-∞; ∞) equals to 1.