Trigonometric Unit Circle Chart

A graphical representation of the unit circle for government exams, showing angles, sin, cos values, and quadrants.

Key Trigonometric Identities

Identity	Formula
Pythagorean	sin²θ + cos²θ = 1
Rearranged	sin²θ = 1 - cos²θ
Rearranged	cos²θ = 1 - sin²θ
Note	sin²θ - 1 = -cos²θ (corrected from user query)

Quadrant Signs

Quadrant	sin θ	cos θ	tan θ
I (0°-90°)	+	+	+
II (90°-180°)	+	-	-
III (180°-270°)	-	-	+
IV (270°-360°)	-	+	-

Note: The unit circle plots (cos θ, sin θ) for key angles. Use this to visualize trigonometric values and quadrant signs for government exam preparation.