# Trigonometric Function: Quick Revision of Formulae for IIT JEE, UPSEE & WBJEE

Dec 30, 2016 17:04 IST

Get important terms and formulae of unit Trigonometric Function. This unit includes chapters: Trigonometric Functions, Trigonometric Identities and Inverse trigonometric function. This quick revision notes is very important during examination as it will help you in revising complete chapter in very short time. In some engineering entrance examinations such as UPSEE and WBJEE questions are asked directly on formula basis. This revision notes will help you to do good in the examination.

• The word ‘trigonometry’ is derived from the Greek words ‘trigon’ and ‘metron’ and it means ‘measuring the sides of a triangle’.
• Angle is a measure of rotation of a given ray about its initial point.

Reciprocal Identities

Quotient Identities

Even/Odd Identities

Pythagorean Identities

Cofunction Identities

Sum and Difference Identities

Double-Angle Formulae

UPSEE 2017 Solved Sample Paper Set-1

Half-Angle Formulas

Law of Sines

Let a, b, c be the sides of the triangle and A be the angle opposite to side a, B be the angle opposite to side b and C be the angle opposite to side c, then

Law of Cosines

Let a, b, c be the sides of the triangle and A be the angle opposite to side a, B be the angle opposite to side b and C be the angle opposite to side c, then

Domain and Range of Inverse Trigonometric Function

Important Inverse trigonometric formulae

JEE Main Physics Solved Sample Paper Set-VII

Law of Cosines

Let a, b, c be the sides of the triangle and A be the angle opposite to side a, B be the angle opposite to side b and C be the angle opposite to side c, then

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