Finding Value of trignometric functions, given other functions

Chapter 3 Class 11 Trigonometric Functions
Concept wise

Β

Β

## Basic Identities

cos 2 Β ΞΈ + sin 2 Β ΞΈ = 1

1 + tan 2 Β ΞΈ = sec 2 Β ΞΈ

1 + cot 2 Β ΞΈ = cosec 2 Β ΞΈ

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### Transcript

In right triangle ABC sinβ‘π= (π πππ πππππ ππ‘π π‘π πππππ π)/π»π¦πππ‘πππ’π π cosβ‘π= (π πππ ππππππππ‘ π‘π πππππ π)/π»π¦πππ‘πππ’π π tanβ‘π= (π πππ πππππ ππ‘π π‘π πππππ π)/(π πππ ππππππππ‘ π‘π πππππ π) coπ ππβ‘π= 1/sinβ‘π π ππβ‘π= 1/cosβ‘π cotβ‘π= 1/tanβ‘π

#### Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.