Chapter 3(Trigonometric functions) Important Question Mathematics 11 Class Commerce

                                                                                                                                                 

                                              Chapter-3

                  Trigonometric functions

                                                                                             

                Important question (3-4Marks).               

Que.1

A wheel makes 360 revolutions in one minute. Through how many radians does

it turn in one second?

Answer:-

Que.2

In a circle of diameter 40 cm, the length of a chord is 20 cm. Find the length of

minor arc of the chord.

Answer:-

Que 3

Prove that:-

sin2 x + 2 sin 4x + sin 6x = 4 cos2 x sin 4x

Solution:-

Que 3

cos 4x+cos 3x+cos 2x/sin 4x+sin 3x+sin 2x = cot 3x

Solution:-

Que 5

Prove that:-

Tan x= 4tan x (1-tan²x)/1-6tan²x+tan⁴x

Solution:-

Que.6

Prove that:-

4 sin a.sin(a+π/3).sin(a+2π/3) = sin 3x

Solution:-

Que.7

Evaluate:-

(1+cos π/8)(1+cos 3π/8)(1+cos 5π/8)(1+cos 7π/8)

Solution:-

=1/8

Que.8

Prove that

Sin 10°.sin 30°.sin 50°. Sin 70°=1/16

Solution:-

                                                                                                                                           

Published by:- Let defeat exam

Made by:- Riyan

                                                                                                                                           

If this help you please 

Like,Follow, Comments, Share

We also have ACCOUNTANCY,BUSINESS, ECONOMICS,MATHEMATICS.

WITH NOTES.

Our blog/website link:- examdeafeat.blogspot.com

Chapter:-1(important question):--- https://examdeafeat.blogspot.com/2021/03/lets-defeat-exam.html

Chapter:-2(important question):-_-

https://examdeafeat.blogspot.com/2021/03/chapter-2-realation-and-functions.html.

                                                                                                                                            

Give support and suggestions for our blog or website

Thankyou

            

                                                                                                                                            

 a circle of diameter 40 cm, the length of a chord is 20 cm. Find the length of

inor arc of the chord

 Qua