Recent content by nam

Following is my explanation (pls respond if it is correct or not): eigenfunctions $\phi_n(x)$ form a complete set => any function $f(x)$ can be uniquely and exactly expanded in terms of $\phi_n(x)$, $$ f(x)=\sum_n c_n\phi_n(x) => c_n=\int f(x')\phi_n^*(x')dx' $$ $$ => f(x)=\sum_n...

I am not sure enough but this is my solution: Suppose lambda is your angle: tan(lambda)=a*sqrt(2)/a=sqrt(2) lambda=tan^-1(sqrt(2))