Trigonometria: arcos notáveis, coordenadas de pontos e ângulos relativos

Apuntes

``` 29/04/26 Matemática Atividades 1- Consultando o quadro dos arcos notáveis, calcule: a) Sen 120° b) Cos 120° c) Sen 210° d) Cos 210° e) Sen 300° f) Cos 300° 2- Em cada um dos itens, determine as coordenadas dos pontos assinalados: a) ``` ```svg <svg width="200" height="200" xmlns="http://www.w3.org/2000/svg"> <circle cx="100" cy="100" r="80" stroke="black" stroke-width="2" fill="none"/> <line x1="100" y1="20" x2="100" y2="180" stroke="black" stroke-width="1"/> <line x1="20" y1="100" x2="180" y2="100" stroke="black" stroke-width="1"/> <line x1="100" y1="100" x2="150" y2="50" stroke="black" stroke-width="1" stroke-dasharray="4"/> <line x1="100" y1="100" x2="50" y2="150" stroke="black" stroke-width="1" stroke-dasharray="4"/> <text x="150" y="45" font-family="Arial" font-size="12">(sqrt{3}/2, 1/2)</text> <text x="95" y="15" font-family="Arial" font-size="12">N</text> <text x="185" y="105" font-family="Arial" font-size="12">M</text> <text x="95" y="195" font-family="Arial" font-size="12">P</text> <text x="15" y="105" font-family="Arial" font-size="12">Q</text> </svg> ``` --- ``` b) P (- rac{sqrt{2}}{2}, rac{2}{2}) c) Q ( rac{1}{2}, - rac{sqrt{3}}{2}) 3. Determine os ângulos relativos...