Page 1 of 1

Dhaka Higher Secondary 2010/3 (Secondary 2010/5)

Posted: Tue Jan 18, 2011 2:03 pm
by BdMO
If $x$ is very very very small $\sin x \approx x$. An operator $S_n$ is defined such that $ S_n(x)= \sin \sin \sin \cdots \sin x$ (a total of $n$ $\sin$ operators are included here). For sufficiently large $n$, $S_n(x) \approx S_{n-1}(x)$.

In that case, express $\cos (S_n(x))$ as the nearest rational value.

Re: Dhaka Higher Secondary 2010/3 (Secondary 2010/5)

Posted: Tue Feb 01, 2011 11:23 pm
by Moon