6.2 Trigonometric Functions: Unit Circle Approach/35

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Failed to parse (Conversion error. Server ("https://en.wikipedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle \sin {(45^{\circ })}\cos {(45^{\circ })}={\frac {{\sqrt {2}}{2}}{\cdot }}{\frac {\sqrt {2}}{=}}}