6.2 Trigonometric Functions: Unit Circle Approach/55

$405^{\circ }={\frac {\pi }{4}}$

$sin={\frac {\sqrt {2}}{2}}$ <

Failed to parse (Conversion error. Server ("https://en.wikipedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle cos={\frac {\sqrt {2}}{2}}}

$tan={\frac {{\sqrt {2}}/2}{{\sqrt {2}}/2}}=1$