Using Pythagorean Identities to solve Trigonometry problems | CBSE class 10 maths solutions Trigonometry

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 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Exercise 8.4 Q3(2)

00:53 Trigonometric Ratios of Complementary Angles

Two angles are said to be complementary if their sum equals 90° pair of complementary angles A and 90° – A .

sin (90° – A) = cos A, cos (90° – A) = sin A ,

02:41 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Exercise 8.4 q4. Choose the correct option. Justify your choice.

02:48 (i)

03:15 Use Pythagorian Identity

secant squared theta minus tan squared theta = 1

03:28 (ii)

substitute the given angles

04:16 simplifying radicals

04:45 (iii)

05:10 reciprocal identity

05:56 Use Pythagorian Identity

sin squared theta plus cos squared theta = 1

06:24 (iv)

06:45 reciprocal identity

07:41 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Exercise 8.4 q2. Write all the other trigonometric ratios of ? A in terms of sec A.

07:45 What is 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

08:02 Pythagorian Identities

08:48 write sin A in terms of Sec A

09:07 Using Recipracal Identities , write cos A as (1/SecA).

09:17 Pythagorian Identity 1

10:11 SinA in terms of SecA.

10:49 Tan A in terms of SecA.

11:37 CosecA in terms of SecA.

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CBSE solutions for class 10 maths Chapter 8 Trigonometry Exercise 8.3

CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Exercise 8.4 | Trigonometric Identities

CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry

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NCERT solutions for CBSE class 10 maths Trigonometry

CBSE class 10 maths Trigonometry

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