- 810 名前：dCR.net mailto: arctan(ax)/arctan(bx) = (a/b) + (a/b)(aa-bb){ -(1/3)x^2 + (1/45)(9aa+4bb)x^4 - (1/945)(135a^4 +72aabb +44b^4)x^6 + ････ }
a/b = 5/4 のとき
(5/4) - (3/20)(ax)^2 + (289/2500)(ax)^4 - (17777/187500)(ax)^6 + ････
これより
ax = 0.24994774
x = 0.25 [] - [ここ壊れてます]
