The Question -

Sketch $\displaystyle H(t - \pi/4) - H(t)$

My Attempt -

I thought the function was in the form of a pulse function $\displaystyle H(t - a) - H(t - b)$

Whereby

$\displaystyle
f(t)=\left\{
\begin{array}{l l l}
0, & t<a\\
1, & a \leq t < b\\
0, & t \geq b
\end{array}\right.
$

But these conditions would not create a step.... Or would they?

If you know where I've gone wrong or can explain what's going on to me that would be great.

Thanks