Função Seno: Da Roda Gigante à Senoide

Section role: supports the formalization section by bridging the group discoveries from Section 2 with the rigorous mathematical definitions in Section 3, while the teacher explains the algebraic properties on the screen. Slides: (1) Title — 'A Função Seno: f(x) = sen(x)'; (2) Do Círculo à Onda — bullets: visual comparison of the unit circle's vertical projection plotted onto a cartesian plane; (3) O Domínio da Função — bullets: why x can be any real number, representing infinite cycles of the wheel; (4) O Conjunto Imagem [-1, 1] — bullets: maximum height 1, minimum height -1, why values outside this range are impossible; (5) O Período Fundamental — bullets: 2π as the exact duration of one complete cycle before the wave repeats; (6) Valores Notáveis — bullets: table and graph points for 0, π/2, π, 3π/2, and 2π; (7) Alerta de Confusão — bullets: differentiating sine (y-coordinate) from cosine (x-coordinate); Closing slide: 'Qual é a altura da roda gigante quando x = 5π/2?' — hands control back to the teacher to start individual practice.