NCERT Solutions for Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.2 are part of NCERT Solutions for Class 10 Maths. Here are we have given Chapter 8 **Introduction to Trigonometry Class 10 NCERT Solutions Ex 8.2.**

- Introduction to Trigonometry Class 10 Ex 8.1
- Introduction to Trigonometry Class 10 Ex 8.3
- Introduction to Trigonometry Class 10 Ex 8.4

Board |
CBSE |

Textbook |
NCERT |

Class |
Class 10 |

Subject |
Maths |

Chapter |
Chapter 8 |

Chapter Name |
Introduction to Trigonometry |

Exercise |
Ex 8.2 |

Number of Questions Solved |
4 |

Category |
NCERT Solutions |

## NCERT Solutions for Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.2

NCERT Solutions for Class 10 Maths

Page No: 187

**Question 1.** Evaluate the following :

(i) sin 60° cos 30° + sin 30° cos 60°

(ii) 2 tan^{2}45° + cos^{2}30° – sin^{2}60°

(iii)

(iv)

(v)

**Solution:
**

**Question 2.** Choose the correct option and justify your choice :

(i)

(A) sin 60° (B) cos 60° (C) tan 60° (D) sin 30°

(ii)

(A) tan 90° (B) 1 (C) sin 45° (D) 0

(iii) sin 2A = 2 sin A is true when A =

(A) 0° (B) 30° (C) 45° (D) 60°

(iv)

(A) cos 60° (B) sin 60° (C) tan 60° (D) sin 30°

**Solution:
**

**Question 3.** If tan (A + B) = √3 and tan (A – B) = 1/√3; 0° < A + B ≤ 90°; A > B, find A and B.

**Solution:
**

**Question 4.** State whether the following 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:
**

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