Casio fx-991EX vs Hp 50g speed difference

[Carsen]

(07-25-2018 06:32 PM)Albert Chan Wrote:  Just integrate above transformed f, from -1 to 1:

\(\int_0^{200}sin(x) dx \) = \(\int_{-1}^{1}150(1-u^2) sin[50u (3 - u^2) + 100] du \)

My 50g reduces the transformed integral to -(COS(200)-1) in 1.7 seconds. If I evaluate the same transformed integral in approx. mode, I get the answer of .512812325001 in 61.45 seconds.