Trigonometry Unit Circle Cheat Sheet

By Dr. Iris Vaughan, Mathematics Editor·Published 1 September 2025·Last reviewed 20 March 2026

All standard angles on the unit circle — 0, 30, 45, 60, 90 degrees and their radian equivalents — with exact sine, cosine, and tangent values.

Key Formulas

0°=0rad: (1,0)
30°=π/6: (√3/2,1/2)
45°=π/4: (√2/2,√2/2)
60°=π/3: (1/2,√3/2)
90°=π/2: (0,1)
180°=π: (−1,0)
270°=3π/2: (0,−1)

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