## Trigonometry

### Use of Trigonometric Functions of Standard Angles

Physics Chemistry  Biology  Mathematics Science > Mathematics > Trigonometry > You are Here Evaluate the following Example – 01: sin20c + sin2(π/6)c + sin2(π/3)c + sin2(π/2)c   = (0)2 + (1/2)2 + […]

### Signs of Trigonometric Functions

Signs of Trigonometric Functions in Different Quadrants: θ lies in Quadrant → I II III IV Trigonometric Functions↓ sin θ + ve + ve – ve – ve cos θ […]

### Trigonometric Ratios of Standard Angles in Third and Fourth Quadrants

Physics Chemistry  Biology  Mathematics Science > Mathematics > Trigonometry > You are Here Trigonometric Ratios of 210o or (7π/6)c: Let m∠ AOP = θ = 210o = (7π/6)c m∠ POM = 30o Ray […]

### Trigonometric Ratios of Standard Angles in First and Second Quadrants

Physics Chemistry  Biology  Mathematics Science > Mathematics > Trigonometry > You are Here A circle with the centre at the origin and radius 1 is a standard unit circle. Let P(x, y) […]

### Area of Sector

Physics Chemistry  Biology  Mathematics Science > Mathematics > Trigonometry > You are Here Example – 01: Find area of sector of circle which subtends an angle of 120° at the centre, if […]

### Angle Measurement – 02

Physics Chemistry  Biology  Mathematics Science > Mathematics > Trigonometry > You are Here Example – 01: If xc = 405° and y° = – (π/12)c. Find x and y Given xc = […]