Understand the geometric meaning of sine, cosine, and tangent through the unit circle.
θ = 0.0° | 0.000 radcosine1.0000sine0.0000tangent0.0000cos(θ) = xsin(θ) = ytan(θ) = y / x (when x ≠ 0)Rotate the point to 30 degrees (π/6 radians). Where sin = 0.5.
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