# NCERT Solutions for Class 10 Maths Chapter 8 Exercise 8.3

NCERT Solutions for class 10 Maths Chapter 8 Exercise 8.3 Introduction to Trigonometry PDF in Offline Apps or Hindi Medium and English Medium or View in Video Format free for CBSE as well as UP Board students who are following CBSE guidelines and following CBSE Syllabus from 2019-20 for their upcoming exams in March 2020. Download (Exercise 8.3) here in PDF.

 Class 10: Maths – गणित Chapter 8: Introduction to Trigonometry (Exercise 8.3)

## NCERT Solutions for class 10 Maths Chapter 8 Exercise 8.3

### 10 Maths Chapter 8 Exercise 8.3 Sols in Video

NCERT Solutions for class 10 Maths Exercise 8.3 in video format with complete description.

### Class 10 Maths Chapter 8 Exercise 8.3 Solutions in Hindi

NCERT Solutions for class 10 Maths Chapter 8 Exercise 8.3 Introduction to Trigonometry in HINDI MEDIUM free to use without any LOGIN or PASSWORD so that you have the liberty to use contents without any hesitation. Solutions are updated for CBSE Exams of March 2019 for CBSE and UP Board. Click here to move Class 10 Maths Chapter 8 for other exercises whether download or online study. Go back to English Medium or View in Video Format Solutions.

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#### Extra Questions on Trigonometry for Practice

1. If tan (3x – 15) = 1 then find the value of x. [Answer: 20]
2. Prove that: tan cot A/(1 – cot A) + cot A/(1 – tan A) = 1 + tan A + cot A.
3. Prove that: (sin θ + cosec θ)² + (cos θ + sec θ)² = 7 + tan² θ + cot² θ
4. Prove that: sec A (1 – sin A) (sec A + tan A) = 1.

1. If cos B + sin B = √2 cos B, then show that cos B – sin B = √2 sin B.
2. If tan A + sin A = m, tan A – sin A = n, then show that m² – n² = 4√(mn).
3. If sec A = x = 1/4x, prove that sec A + tan A = 2x or 1/2x.
4. If sin α + sin² α = 1, prove that cos² α + (cos² α)² = 1.