Class 11 Math Chapter 3 Trigonometric Functions Notes PDF (Handwritten & Short Notes)

BoardStudy given class 11 math Trigonometric Functions notes according to latest NCERT syllabus to make your study more convenient and easy. We have covered every topic in a simple and easy way so anyone can understand the chapter and perform well in the exam.

Notes are very clean and colourful written by BoardStudy subject matter experts. Every important concept, formula, diagram and derivation is shared in the Trigonometric Functions notes that will help you solve the problem. By reviewing these notes regularly you will master the Trigonometric Functions chapter and can score well in exam.

Class 11 Math Trigonometric Functions Notes

Chapter 2: Relations and Functions Notes
Chapter 4: Complex Numbers and Quadratic Equations Notes

Key Points Trigonometric Functions

Trigonometric Functions

Angles

It is a measure of rotation of a given ray about its initial point.

• Positive angle
• Negative angle

Degree Measure

If a rotation from initial side to terminal side is $\frac{1}{360}$3601​th of a revolution, the angle is said to have a measure of one degree.$$1^\circ = 60′ \text{ (60 minutes)}$$1∘=60′ (60 minutes) $$1′ = 60” \text{ (60 seconds)}$$1′=60′′ (60 seconds)

Radian Measure

A radian is an angle subtended at the centre of a circle by an arc whose length is equal to the radius of the circle.

If in a circle of radius $r$r, an arc of length $l$l subtends an angle $\theta$θ radian at the centre, we have:

Compound Angle Formula