tg(П-t)

The expression \( \tan(\pi - t) \) can be simplified using the properties of the tangent function. Specifically, the tangent of an angle is negative when the angle is in the second quadrant.

The formula is:

\[ \tan(\pi - t) = -\tan(t) \]

So, if you're working with the expression \( \tan(\pi - t) \), it simplifies to \( -\tan(t) \).