反三角函数导数几何证明
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这个范例通过几何方法演示了反三角函数 arctan 的导数公式。核心数学概念包括导数、斜率、圆、角度和几何变换。作图要点使用了 GeoGebra 命令如 Intersect(交点)、Segment(线段)、Circle(圆)、Ray(射线)、Angle(角度)、Midpoint(中点)、Rotate(旋转)、OrthogonalLine(垂线)、CircleArc(圆弧)、Center(中心)、Polygon(多边形)、Point(点)等。适合高中及以上学段学习微积分和几何作图。
GeoGebra 命令及参数
Intersect(xAxis, yAxis) → OIntersect(c, f, 1) → ASegment(O, F) → lCircle((0, 0), l) → dIntersect(d, f, 1) → DSegment(O, A) → gSegment(O, D) → hRay(O, A) → iIntersect(d, i, 1) → CIntersect(c, h, 1) → B_1Segment(A, C) → jIntersect(f, xAxis) → BAngle(A, O, B_1) → θSegment(A, O) → mSegment(O, D) → nMidpoint(m) → GMidpoint(n) → HRotate(H, π / 5, O) → H'Segment(A, B) → sSegment(O, B) → f_1Segment(D, B) → g_1Angle(B, O, D) → αAngle(B, O, A) → βSegment(O, A) → h_1Segment(O, D) → i_1Segment(D, C) → pSegment(A, C) → aSegment(A, D) → eMidpoint(p) → IMidpoint(j) → JSegment(D, J) → j_1Segment(A, I) → k_1Intersect(j_1, k_1) → KOrthogonalLine(C, j) → l_1Angle(A, B, O) → γAngle(O, A, B) → δAngle(C, A, D) → εIntersect(l_1, yAxis) → MAngle(A, C, M) → ζCircleArc(O, C, D) → c_1Segment(O, C) → m_1Midpoint(m_1) → LCenter(c_1) → NRotate(C, θ / 2, O) → C'Polygon(O, D, B) → poly1, b_2, o_1, d_1Point(xAxis) → EPoint(xAxis) → PPoint(p_1) → QOrthogonalLine(Q, p_1) → q_1OrthogonalLine(E, q_1) → r_1Intersect(q_1, r_1) → RPoint(s_1) → USegment(S, U) → e_1OrthogonalLine(U, e_1) → f_2OrthogonalLine(T, f_2) → g_2OrthogonalLine(S, g_2) → h_2Point(h_2) → VPoint(g_2) → WPolygon(S, U, W, V) → poly2, s_2, u_1, w_1, v_1Point(n_1) → ZRay(Z, C) → j_2Intersect(l_1, k_2) → A_1Intersect(l_1, l_2) → C_1Segment(A_1, C_1) → n_2