NCERT Solutions For Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.3

# NCERT Solutions For Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.3

Get Free NCERT Solutions for Class 10 Maths Chapter 8 Ex 8.3 Introduction to Trigonometry Class 10 Maths NCERT Solutions are extremely helpful while doing homework. Experienced Teachers prepared exercise 8.3 Class 10 Maths NCERT Solutions. Detailed answers to all the questions in Chapter 8 Maths Class 10 Coordinate Geometry Exercise 8.3 are Provided in NCERT Textbook.

## Topics and Sub Topics in Class 10 Maths Chapter 8 Introduction to Trigonometry:

 Section Name Topic Name 8 Introduction to Trigonometry 8.1 Introduction 8.2 Trigonometric Ratios 8.3 Trigonometric Ratios Of Some Specific Angles 8.4 Trigonometric Ratios Of Complementary Angles 8.5 Trigonometric Identities 8.6 Summary

You can also download the free PDF of Chapter 8 Ex 8.3 Coordinate Geometry NCERT Solutions or save the solution images and take the printout to keep it handy for your exam preparation.

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 Board CBSE Textbook NCERT Class Class 10 Subject Maths Chapter Chapter 8 Chapter Name Introduction to Trigonometry Exercise Ex 8.3 Number of Questions Solved 7 Category

## NCERT Solutions For Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.3

Ex 8.3 Class 10 Maths Question 1.
Evaluate:

Solution:

Ex 8.3 Class 10 Maths Question 2.
Show that:
(i) tan 48° tan 23° tan 42° tan 67° = 1
(ii) cos 38° cos 52° – sin 38° sin 52° = 0
Solution:

Ex 8.3 Class 10 Maths Question 3.
If tan 2A = cot (A – 18°), where 2A is an acute angle, find A’s value.
Solution:

Ex 8.3 Class 10 Maths Question 4.
If tan A = cot B, prove that A + B = 90°.
Solution:

Ex 8.3 Class 10 Maths Question 5.
If sec 4A = cosec (A – 20°), where 4A is an acute angle, find A’s value.
Solution:

Ex 8.3 Class 10 Maths Question 6.
If A, B and C are interior angles of a triangle ABC, then show that: sin ($$\frac { B+C }{ 2 }$$) = cos $$\frac { A }{ 2 }$$
Solution:

Ex 8.3 Class 10 Maths Question 7.
Express sin 61° + cos 75° in terms of trigonometric ratios of angles between 0° and 45°.
Solution:

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