Learning goals: Teacher Facing Comprehend that coordinates for a point 1 unit away from the origin in quadrant 1 can be represented by $(\cos(A),\sin(A))$ where $A$ is the angle the point makes with the $x$-axis. Recall definitions for cosine, sine, and tangent of an angle in a right triangle. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from Alg2.6 Trigonometric Functions, Algebra 2.