# Interactive video lesson plan for: Write other Trigonometric Ratios in terms of CotA using Pythagorian Identities

#### Activity overview:

Write other Trigonometric Ratios in terms of CotA using Pythagorian Identities

We will study some ratios of the sides of a right triangle with respect to its acute angles, called trigonometric ratios of the angle. Learn how to solve the problems based on the relation between the trigonometrical ratios.

In this tutorial we show you how to name the sides of a right-angled triangle in preparation for using trigonometry to find lengths and angles in right-angled triangles
maths-revision/core-maths/trigonometry/triangle/right-angle/tutorial
In this tutorial I show you how to find the length of a side by using trigonometry when the missing side is in the top of the trigonometry ratio fraction.
this is done if you are given the opposite angle and the two other sides.

http://www.learncbse.in/ncert-class-10-math-solutions/
http://www.learncbse.in/ncert-solutions-for-class-10-maths-chapter-8-introduction-to-trigonometry/
http://www.learncbse.in/rd-sharma-class-10-solutions-chapter-5-trigonometric-ratios/

00:02 1. Express the trigonometric ratios sin A, sec A and tan A in terms of cot A.
00:24 Defination of trigonometry Identities
An equation is called an identity when it is true for all values of the variables involved.
An equation involving trigonometric ratios of an angle is called a trigonometric identity, if it is true for all values of the angle(s) involved
00:30 Pythagorean Identities
01:22 Recipracal Identities
02:03 Use of Pythagorian Identity
Cosecant squared theta minus cot squared theta = 1
02:54 Express sin A in terms of CotA
03:11 Find sec A in terms of Cot A
03:23 Use of Pythagorian Identity
secant squared theta minus tan squared theta = 1
04:06 Recipracal Identities
04:40 Sec A in terms of Cot A.

CBSE class 10 maths NCERT Solutions chapter 8 Trigonometry Exercise 8.4| trigonometric identities
CBSE class 10 maths NCERT Solutions chapter 8 Trigonometry
Solutions for CBSE class 10 Maths chapter 8 Trigonometry
NCERT solutions for class 10 maths Triangles
NCERT solutions for CBSE class 10 maths chapter 8 Trigonometry
CBSE class 10 maths solutions chapter 8 Trigonometry

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