Trigonometry table | Tigonometric ratios of special angles 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/

00:01 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Ex 8.2 Q1. solving trigonometric expressions invoving specific Angles: 0°, 30°, 45°, 60°, 90°

00:16 (i) sin 60° cos 30° + sin 30° cos 60°

00:33 Trigonometry table

Values of Trigonometric Ratios for Standard Angles 0°,sin 30°, 45°,cos 60°, 90°

01:00 simplify the fractions

01:19 (ii) 2 tan2 45° + cos^2 30° – sin^2 60°

01:39 Trigonometric Ratios of specific Angles 0°, cos 30°, 45°, sin 60°, 90°

02:29 (iii) cos 45° / (sec 30° + cosec 30° )

02:45 Values of Trigonometric Ratios for Standard Angles (Trigonometry table)

02:53 Reciprocal identity

03:25 solve fractions

03:55 (iv) (sin 30° + tan 45° – cosec 60°) / (sec 30° + cos 60° + cot 45°)

04:24 Determine all Values of Trigonometric Ratios for Standard Angles using Trigonometry table.

04:50 Solving trigonometric expressions inmolving fractions.

05:40 (v)

06:08 Find Values of Trigonometric Ratios for Standard Angles 0°, 30°, 45°, 60°, 90°.

Use Trigonometry table.

06:46 solve fractions by simplifying numerator and denominator

07:55 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Ex 8.2 Q2. solve problems on Trigonometric Ratios of Specific Angles

08:03 (i) (2tan30°) / (1+tan2 30°)

08:19 Find Values of Trigonometric Ratios for Standard Angles 0°, tan 30°, tan 45°, tan 60°, 90°

08:36 simplify the fractions involving surds or radicals

09:18 check the solution by determining Values of Trigonometric Ratios for Standard Angles

09:25 (ii)

09:41 Trigonometry table

Values of Trigonometric Ratios for Standard Angles 0°,sin 30°, 45°,cos 60°, 90°

10:36 (iii) sin 2A = 2 sin A is true when A =

10:55 Verify by substitution

11:45 (iv)

12:03 Values of Trigonometric Ratios for Standard Angles(Trigonometry table)

12:16 solve fractions.

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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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