From the unit circle, we can deduce the 3 correct statements.
1. The first correct sine statement is;
[tex]\sin 45=\frac{\sqrt[]{2}}{2}[/tex]
2. The correct cosine statement is;
[tex]\cos 45=\frac{\sqrt[]{2}}{2}[/tex]
3. The correct tangent statement is;
[tex]\tan 45=1[/tex]
Here's a diagram to show why
