# NCERT Solutions for Class 10 Maths Chapter 8 Exercise 8.2

NCERT Solutions for class 10 Maths Chapter 8 Exercise 8.2 Introduction to Trigonometry in PDF format in Hindi Medium and English Medium for download or View in Video Format free updated for new session 2021-2022.

Download Offline Apps 2021-22 of NCERT Solutions, which are prepared by expert teachers in easiest form suitable for all the students. These are based on latest CBSE Curriculum 2021-22 for CBSE as well as MP Board, UP Board students. Download (Exercise 8.2) in PDF or use online given below.## NCERT Solutions for class 10 Maths Chapter 8 Exercise 8.2

Class: 10 | Maths (English and Hindi Medium) |

Chapter 8: | Exercise 8.2 |

### 10 Maths Chapter 8 Exercise 8.2 Solutions

NCERT Solutions for class 10 Maths Chapter 8 Exercise 8.2 Introduction to Trigonometry in English & Hindi Medium to free download in PDF and option to study online also available. All of our digital study contents are free to use. These are updated time to time as per requirement of the students. Solutions are applicable for CBSE / UP Board / Uttarakhand Board / Boards using NCERT books 2021-22 and following new CBSE curriculum 2021-2022.

#### Class 10 Maths Chapter 8 Exercise 8.2 Solution in Hindi Medium Video

#### Class 10 Maths Chapter 8 Exercise 8.2 Solution in Videos

#### Important Questions with Answers

- 1. Express sec θ in terms of cot θ. [Answer: √(1 + cos²θ)/cot θ]
- 2. Find the value of cosθcos (90 – θ) – sin θsin (90 – θ). [Answer: 0]
- 3. If sin (20 + θ) = cos 30° then find the value of θ. [Answer: 50]
- 4. If x = p sec θ + q tan θ & y = p tan θ + q sec θ then prove that x² – y² = p² – q².

##### Questions from Board Papers

- If 7sin² θ + 3cos² θ = 4 then show that tan θ = 1/√3.
- If Sin (A – B) = 1/2, cos (A + B) = 1/2, then find the value of A and B. [Answer: A = 45, B = 15]
- Prove that: tan 1° tan 11° tan 21° tan 69° tan 79° tan 89° = 1
- If sec 4 A = cosec (A – 20°) then find the value of A. [Answer: 22]

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##### Can students solve all questions of exercise 8.2 of 10th maths easily?

If students remember the values of sin 45°, cos 45°, tan 45° cosec 45° , sec 45°, cot 45° , sin 30°, cos 30°, tan 30°, cosec 30°, sec 30°, cot 30°, sin 60°, cos 60°, tan 60°, cosec 60°, sec 60°, cot 60°, sin 90°, cos 90°, tan 90°, cosec 90°, sec 90°, cot 90°, sin 0°, cos 0°, tan0°, cosec 0°, sec 0°, cot 0° on tips then they can easily solve all questions of exercise 8.2 of 10th maths.

If they don’t remember the values then exercise 8.2 becomes difficult for them.

##### Which examples of exercise 8.2 of class 10 math are expected for board Exams?

There are 3 examples (example 6, 7 and 8) in exercise 8.2 of class 10 math and all the examples have equal chance to come in exams. All these examples are of different type. Example 6 is quite easy to understand than Examples 7 and 8.

##### How much time needed to complete exercise 8.2 of Class 10th?

Students need maximum 1-2 days to complete exercise 8.2 (chapter 8) of class 10th mathematics if they are giving 2 hours per day. This time also depends on student’s speed, efficiency and capability.

##### What are the CBSE Board Exams expected questions from exercise 8.2 of 10th Maths?

Most probably 1 mark questions like MCQ type, True or False type, Fill in the blanks type can come from exercise 8.2 (chapter 8) of class 10th mathematics. Also there are some questions (question 3) and examples (example 7 and 8) in exercise 8.2 which can come in 2 marks.