brianbec said:iStation said:*snip*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)

Wow!

9! Right? [27, 45, 63, 81, 99....]

How about this one?

+ ∞

∫ [{sin(9x)}/x]dx = ?

− ∞