18/07/03 04:22:20.99 F6g7HQZx.net
>>700
cos(t) = c とおくと
x(t) = 10cos(t) - cos(10t)
= 10c - T_10(c)
= 1 + 10c -50c^2 +400c^4 -1120c^6 +1280c^8 -512c^10,
9 - x(t) = 8 -10c +50c^2 -400c^4 +1120c^6 -1280c^8 +512c^10
= (1-c){8 -2c +48(1+c)c^2 -352(1+c)c^4 +768(1+c)c^6 -512(1+c)c^8}