Algebra - Trigonometry Identities | Trigonometry Identities solved problems

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 equations using trigonometric identities, where the angles involved are acute angles for which the expressions are defined

00:04 q5 (3)

00:30 How to solve Trigonometric equations using Trigonometric identities

00:52 Quotient Identities

cot A = cos A / sin A. tan A = sin A/cos A.

02:21 solving Trigonometric identities

04:03 a cube minus b cube formula

Expanding a cube

04:40 Use Pythagorian Identity

sin squared theta plus cos squared theta = 1

05:21 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. cosecA = 1/sin A.

05:53 How to prove Trigonometric identities summary.

06:05 Q5. Prove the trigonometric equations using trigonometric identities, where the angles involved are acute angles for which the expressions are defined

06:08 q5 (2)

06:23 Procedure for proving Trigonometric equations

06:45 consider LHS of the trigonometric equation

07:24 algebra maths formulas | Algebraic Expressions and Formulas

USE (a-b)^2 expanding formula

08:02 Use Pythagorian Identity

sin squared theta plus cos squared theta = 1

09:04 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

09:17 How to prove Trigonometric identities.

00:02 Q5. Prove the trigonometric identities, where the angles involved are acute angles for which the expressions are defined

09:42 q5 (i)

09:56 Procedure for solving Trigonometric equations

10:08 consider LHS of the trigonometric equations

10:18 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.

09:53 Use Pythagorian Identity

sin squared theta plus cos squared theta = 1

12:17 trigonometric equation is proved

12:38

00:02 Q5. Prove the trigonometric equations using trigonometric identities, where the angles involved are acute angles for which the expressions are defined

12:44 q5 (4)

13:06 solving trigonometric identities procedure

13:21 consider LHS of the trigonometric equation

13:33 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.

14:20 consider RHS of the trigonometric equation

14:36 Use Pythagorian Identity

sin squared theta plus cos squared theta = 1

15:06 a squared minus b square formula

15:33 LHS & RHS of the trigonometric equation are equal.

Hence,trigonometric identity is solved

15:48

15:50 q5 (10). Prove the trigonometric identities, where the angles involved are acute angles for which the expressions are defined

16:25 Learn how to prove trigonometric identities through our working model.

16:32 consider LHS of the trigonometric equation

16:56 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.

cot A = 1 / tan A

17:40 consider middle expression of the trigonometric equation

17:52 use Reciprocal Identity

19:31 trigonometric identities are proved.

19:49 Q5. Prove the trigonometric identities, where the angles involved are acute angles for which the expressions are defined

19:51 q5 (8).

20:19 Procedure for solving Trigonometric equations

20:22 Consider LHS of the trigonometric equation

21:54 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.

cosec A = 1 / sin A.

22:30 Use Pythagorian Identity

22:30 Cosecant squared theta minus cot squared theta = 1

22:33 secant squared theta minus tan squared theta = 1

22:38 Simply the trigonometric expression.

22:54 LHS is RHS of the trigonometric equation.Trigonometric equation is proved.

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.

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CBSE solutions for class 10 maths Chapter 8 Trigonometry Exercise 8.4

Common core Math Trigonometry

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