Trigonometric Identities lesson | Solve Trigonometric Equations with Trigonometric Identities

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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 NCERT solutions for CBSE class 10 maths Trigonometry

CBSE class 10 maths Solutions Trigonometry Exercise 8.4 Q5. Prove the trigonometric equations using trigonometric identities, where the angles involved are acute angles for which the expressions are defined

00:04 q5 (7)

00:19 Procedure for proving Trigonometric equations using trigonometric identities

00:27 Take LHS of the trigonometric equation

01:14 Quotient Identity

tan A = sin A/cos A.

01:22 Use Pythagorian Identity

sin squared theta plus cos squared theta = 1

01:49 solving trigonometric expressions

02:28 LHS is RHS of the trigonometric equation.Trigonometric equation is proved.

02:47 NCERT solutions for CBSE class 10 maths Trigonometry

CBSE class 10 maths Solutions Trigonometry Exercise 8.4 q5 (9). Prove the trigonometric identities, where the angles involved are acute angles for which the expressions are defined

03:11 Learn Procedure for proving Trigonometric equations using trigonometric identities

3:15 consider LHS of the trigonometric equation

03:31 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 / cos A

04:10 Use Pythagorian Identity

sin squared theta plus cos squared theta = 1

05:01 RHS of the trigonometric equation

05:16 Quotient Identity

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

05:54 LHS is RHS of the trigonometric equation.Trigonometric equation is proved.

06:08 NCERT solutions for CBSE class 10 maths Trigonometry

CBSE class 10 maths Solutions Trigonometry Exercise 8.4 Q5. Prove the trigonometric identities, where the angles involved are acute angles for which the expressions are defined

06:14 q5 (8).

06:37 Procedure for solving Trigonometric equations

06:42 Consider LHS of the trigonometric equation

07:59 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.

cosec A = 1 / sin A.

08:41 Use Pythagorian Identity

08:42 Cosecant squared theta minus cot squared theta = 1

08:45 secant squared theta minus tan squared theta = 1

08:52 Simply the trigonometric expression.

08:59 LHS is RHS of the trigonometric equation.Trigonometric equation is proved.

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

NCERT solutions for CBSE class 10 maths Trigonometry

CBSE class 10 maths Solutions Trigonometry Exercise 8.4 q5 (4)

solving trigonometric identities procedure

consider LHS of the trigonometric equation

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.

consider RHS of the trigonometric equation

Use Pythagorian Identity

sin squared theta plus cos squared theta = 1

a squared minus b square formula

LHS & RHS of the trigonometric equation are equal.

Hence,trigonometric identity is solved..

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CBSE solutions for class 10 maths Chapter 8 Trigonometry Exercise 8.4

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NCERT solutions for CBSE class 10 maths Trigonometry

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