# Interactive video lesson plan for: Trigonometry Identities Lessons | CBSE class 10 maths Trigonometry Ex 8.4 Q5

#### Activity overview:

Trigonometry Identities Lessons | CBSE class 10 maths Trigonometry Ex 8.4 Q5

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 Q5. Prove the trigonometric identities, where the angles involved are acute angles for which the expressions are defined
00:04 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Ex 8.4 Q5 (i)
00:18 Procedure for solving Trigonometric equations
00:30 consider LHS of the trigonometric equations
00:40 Reciprocal Identity.
The ratios cosec A, sec A and cot A are respectively, the reciprocals of the ratios sin A, cos A and tan A
Quotient Identity
cot A = cos A / sin A.
01:15 Use Pythagorian Identity
sin squared theta plus cos squared theta = 1
02:39 trigonometric equation is proved

03:00 Q5. Prove the trigonometric equations using trigonometric identities, where the angles involved are acute angles for which the expressions are defined
03:03 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Ex 8.4 Q5 (2)
03:19 Procedure for proving Trigonometric equations
03:41 consider LHS of the trigonometric equation
04:20 algebra maths formulas | Algebraic Expressions and Formulas
USE (a-b)^2 expanding formula
04:58 Use Pythagorian Identity
sin squared theta plus cos squared theta = 1
05:59 Reciprocal Identity.
The ratios cosec A, sec A and cot A are respectively, the reciprocals of the ratios sin A, cos A and tan A
sec A = 1/cos A
06:13 How to prove Trigonometric identities.

06:35
06:37 Q5. Prove the trigonometric equations using trigonometric identities, where the angles involved are acute angles for which the expressions are defined
06:39 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Ex 8.4 Q5 (4)
07:05 solving trigonometric identities procedure
07:18 consider LHS of the trigonometric equation
07:30 Reciprocal Identity.
The ratios cosec A, sec A and cot A are respectively, the reciprocals of the ratios sin A, cos A and tan A
sec A = 1/cos A.
08:17 consider RHS of the trigonometric equation
08:33 Use Pythagorian Identity
sin squared theta plus cos squared theta = 1
09:03 a squared minus b square formula
09:30 LHS & RHS of the trigonometric equation are equal.
Hence,trigonometric identity is solved

09:46 Q5. Prove the trigonometric equations using trigonometric identities, where the angles involved are acute angles for which the expressions are defined
09:48 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Ex 8.4 Q5 (7)
10:04 Procedure for proving Trigonometric equations using trigonometric identities
10:11 Take LHS of the trigonometric equation
10:56 Quotient Identity
tan A = sin A/cos A.
11:09 Use Pythagorian Identity
sin squared theta plus cos squared theta = 1
11:40 solving trigonometric expressions
12:27 LHS is RHS of the trigonometric equation.Trigonometric equation is proved.

12:52 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Ex 8.4 Q5 5. Prove the trigonometric identities, where the angles involved are acute angles for which the expressions are defined
12:58 Procedure for proving Trigonometric equations using trigonometric identities
13:25 Use of Pythagorian Identity
Cosecant squared theta minus cot squared theta = 1
13:52 Reciprocal Identity.
The ratios cosec A, sec A and cot A are respectively, the reciprocals of the ratios sin A, cos A and tan A.
15:20 Important step
1 = Cosecant squared theta minus cot squared theta
16:07 Solve numerator and denominator of the trigonometric identity
17:40 LHS is RHS of the trigonometric equation

Using the fundemental identities and the Pythagorean Identities
multiple examples of verifying trigonometric identities
How to Solve Trigonometric Identities Proving Problems
method to solve trigonometric identities problems
the Quotient Identities, Reciprocal Identities, and the Pythagorian Identities.

Pinterest
https://in.pinterest.com/LearnCBSE/
Wordpress
https://cbselabs.wordpress.com/

learncbse.in
CBSE solutions for class 10 maths Chapter 8 Trigonometry Exercise 8.4
CBSE class 10 maths NCERT SolutionsChapter 8 Trigonometry Exercise 8.2 | Trigonometric Identities
CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry
Solutions for CBSE class 10 Maths Trigonometry
NCERT solutions for class 10 maths Trigonometry
NCERT solutions for CBSE class 10 maths Trigonometry
CBSE class 10 maths Trigonometry
Common core Math Trigonometry

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