Trigonometric Functions
Rajasthan Board · Class 11 · Mathematics
Quick revision notes for Trigonometric Functions — Rajasthan Board Class 11 Mathematics. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Angles and Their Measurement
- An angle is the measure of rotation of a ray about its initial point
- Positive angles are measured anticlockwise, negative angles clockwise
- Two main units: Degree measure and Radian measure
Trigonometric Functions - Definition and Properties
- Trigonometric functions are defined using unit circle with center at origin
- For point P(a,b) on unit circle with angle x: cos x = a, sin x = b
- All trigonometric functions are periodic
Trigonometric Identities
- Fundamental identities relate different trigonometric functions
- Pythagorean identities are derived from the unit circle
- Addition and subtraction formulas are crucial for solving complex problems
Sum and Difference Formulas
- These formulas express trigonometric functions of sum or difference of angles
- They are derived using geometric methods and the unit circle
- Essential for evaluating trigonometric functions of non-standard angles
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Trigonometric Functions covers several key topics that are frequently asked in Rajasthan Board Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
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