Hi All,

Could any one explain me how to solve this problem.

what is the value of cos(px), if x tends to infinite.

From the Dirac delta function, del(p) = limit(x tends to infinite) {sin(px)/(pi*p)}.

here 'p' is a constant.

Instead of using the relation between the sin and cos, Is there any other way to solve the above problem.

another request : How to type mathematical expression in the threads?