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.
Tags
MATHS