iStation said:algorith said:*snip*OK!

Another one,

lim x->0 [{sin(9x)}/x] = ?

Nice one. Here's another

Find the first positive real value of t for which the following is zero

256 cos^9(pi t / 162) - 576 cos^7(pi t / 162) + 432 cos^5(pi t / 162) -120 cos^3(pi t/162) + 9 cos(pi t / 162)