Chapter 8 Introduction to Trigonometry Ex 8.2

Question 1.
Evaluate the following:
NCERT Solutions for Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.2 1
Solution:
NCERT Solutions for Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.2 2
NCERT Solutions for Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.2 3

Question 2.
Choose the correct option and justify your choice:
NCERT Solutions for Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.2 4
Solution:
NCERT Solutions for Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.2 5
NCERT Solutions for Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.2 6

Question 3.

Question 4.
State whether the following statements are true or false. Justify your answer.
(i) sin (A + B) = sin A + sin B.
(ii) The value of sin θ increases as θ increases.
(iii) The value of cos θ increases as θ increases.
(iv) sin θ = cos θ for all values of θ.
(v) cot A is not defined for A = 0°.
Solution:
NCERT Solutions for Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.2 7
NCERT Solutions for Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.2 8

Chapter 8 Introduction to Trigonometry Ex 8.2