Question

Given one coordinate of a point on the unit circle, (√2\2, y), find the missing coordinate.

A) 1\2
B) √2\2
C) 0
D) 3\4

Answer 1

Ooh oh oh I just learned this one sec

Answer 2

the UNIT circle means, the circle has a radius of 1

so \(\bf \left(\frac{\sqrt{2}}{2}, y\right)\to (x,y)\to
\begin{cases}
x=\frac{\sqrt{2}}{2}
\\ \quad \\
y=?
\end{cases}\)

thus