002-9.htm

> expand(tan(2*x));

> expand(tan(3*x));

> expand(tan(4*x));

> expand(tan(5*x));

下一個函數等於 [ 前一個函數 + tan(x)] 除以 [1- 前一個函數乘 tan(x)]

-2*tan(x)/(-1+tan(x)^2)

tan(x)*(-3+tan(x)^2)/(-1+3*tan(x)^2)

-4*tan(x)*(-1+tan(x)^2)/(1-6*tan(x)^2+tan(x)^4)

tan(x)*(5-10*tan(x)^2+tan(x)^4)/(1-10*tan(x)^2+5*ta...