diff --git a/apps/calculation/additional_outputs/trigonometry_graph_cell.cpp b/apps/calculation/additional_outputs/trigonometry_graph_cell.cpp
index 49b7501a7..615bd5077 100644
--- a/apps/calculation/additional_outputs/trigonometry_graph_cell.cpp
+++ b/apps/calculation/additional_outputs/trigonometry_graph_cell.cpp
@@ -19,10 +19,14 @@ void TrigonometryGraphView::drawRect(KDContext * ctx, KDRect rect) const {
   drawCurve(ctx, rect, 0, 2.0f*M_PI, M_PI/180.0f, [](float t, void * model, void * context) {
       return Poincare::Coordinate2D<float>(std::cos(t), std::sin(t));
     }, nullptr, nullptr, true, Palette::GreyDark, false);
+  // Draw dashed segment to indicate sine and cosine
   drawSegment(ctx, rect, Axis::Vertical, std::cos(m_model->angle()), 0.0f, std::sin(m_model->angle()), Palette::Red, 1, 3);
   drawSegment(ctx, rect, Axis::Horizontal, std::sin(m_model->angle()), 0.0f, std::cos(m_model->angle()), Palette::Red, 1, 3);
+  // Draw angle position on the circle
   drawDot(ctx, rect, std::cos(m_model->angle()), std::sin(m_model->angle()), Palette::Red);
-  // TODO
+  // Draw labels
+  drawLabel(ctx, rect, Axis::Vertical, std::sin(m_model->angle()), "sin(θ)", Palette::Red);
+  drawLabel(ctx, rect, Axis::Horizontal, std::cos(m_model->angle()), "cos(θ)", Palette::Red);
 }
 
 }