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9-55.
  1. Daniel sketches the graphs at right for y = sin(θ) and y = cos(θ). Homework Help ✎

  2. Unfortunately, he forgets to label the graphs, and now he cannot remember which graph goes with which equation. Explain to Daniel how he can tell (and remember!) which graph is y = sin(θ) and which is y = cos(θ).

Look at the y-intercepts. What is cos(0°)? sin(0°)?