We need to determine the values of the functions sine and cosine for the angle π/2.
One way of finding those values is by observing the following unit circle:
Then, for the angle π/2, we have:
[tex]\begin{gathered} \sin\left(\frac{\pi}{2}\right)=1 \\ \\ \cos\left(\frac{\pi}{2}\right)=0 \end{gathered}[/tex]
