NCERT Solutions for Class 11 Maths Chapter 3 Trigonometric Functions — Exercise 3.20

NCERT class 11 maths chapter 3 Trigonometric Functions

Question 1:0 13 5
cos 13 3
cos 13 9
cos 13
2cos + + =

Exercise Miscellaneous maths class 11 Chapter 3 Trigonometric Functions

Question 2:(sin 3x + sin x) sin x + (cos 3x – cos x) cos x = 0

CBSE class 11 maths ncert solutions Chapter 3

Question 3:(cos x + cos y)2 + (sin x – sin y)2 = 4 cos2 2 x + y

class 11 maths solutions Trigonometric Functions

Question 4:(cos x – cos y)2 + (sin x – sin y)2 = 4 sin2 2 x − y

NCERT class 11 chemistry chapter 3 exercise solutions

Question 5:sin x + sin 3x + sin 5x + sin 7x = 4 cos x cos 2x sin 4x

Trigonometric Functions class 11 ncert solutions

Question 6:(sin7 sin5 ) (sin9 sin3 ) tan6 (cos7 cos5 ) (cos9 cos3 ) x x x x x x x x x + + + = + + +

Question 7:sin 3x + sin 2x – sin x = 4sin x cos x 2 cos 3 2 x Find sin x 2 , cos x 2 and tan x 2 in each of the following :

Exercise Miscellaneous class 11 Math ncert solutions Chapter 3

Question 8:tan x = − 4 3 , x in quadrant II

Miscellaneous Exercise on Chapter 3Prove that:1.

Question 9:cos x = − 1 3 , x in quadrant III

Question 10:sin x = 4 1 , x in quadrant II