---

Step * 2 2 of Lemma arctangent-rtan


arctangent(rtan(r0)) = r0
BY
{ (RWO "rtan0" 0 THEN Auto) }

1
r0 ∈ {x:ℝ| (-(π/2) < x) ∧ (x < π/2)} 

2
r0 ∈ {x:ℝ| (-(π/2) < x) ∧ (x < π/2)} 

---

Latex:

---

Latex:

arctangent(rtan(r0))  =  r0


By

---

Latex:
(RWO  "rtan0"  0  THEN  Auto)

---

Home Index