Please wait...
Contact Us
Contact
Need assistance? Contact us on below numbers

For Study plan details

93219 24448 / 89292 63204

10:00 AM to 7:00 PM IST all days.

For Franchisee Enquiry

81783 72169
OR

Chat with us on WhatsApp

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this number

93219 24448 / 99871 78554

Mon to Sat - 10 AM to 7 PM

Home / Doubts and Solutions/JEE/Mathematics

3

Asked by rbhatt16 7th December 2017, 9:10 PM
Answered by Expert
Answer:
begin mathsize 16px style 1 plus cosx plus cos 2 straight x plus sinx plus sin 2 straight x plus sin 3 straight x equals 0 1 plus cosx plus cos 2 straight x plus sinx plus sin 3 straight x plus sin 2 straight x equals 0 1 plus cosx plus 2 cos squared straight x minus 1 plus 2 sin 2 xcosx plus sin 2 straight x equals 0 space space space space space space space space space space using space sinC plus sinD equals 2 sin fraction numerator straight C plus straight D over denominator 2 end fraction cos fraction numerator straight C minus straight D over denominator 2 end fraction cosx plus 2 cos squared straight x plus 2 sin 2 xcosx plus sin 2 straight x equals 0 cosx left parenthesis 1 plus 2 cosx right parenthesis plus sin 2 straight x left parenthesis 2 cosx plus 1 right parenthesis equals 0 left parenthesis 2 cosx plus 1 right parenthesis left parenthesis cosx plus sin 2 straight x right parenthesis equals 0 left parenthesis 2 cosx plus 1 right parenthesis open parentheses cosx plus 2 sinxcosx close parentheses equals 0 cosx left parenthesis 2 cosx plus 1 right parenthesis left parenthesis 1 plus 2 sinx right parenthesis equals 0 Using space given space condition straight pi over 2 less than open vertical bar 3 straight x minus straight pi over 2 close vertical bar less or equal than straight pi rightwards double arrow straight pi over 2 less than open parentheses 3 straight x minus straight pi over 2 close parentheses less or equal than straight pi space space space or space space space straight pi over 2 less than negative open parentheses 3 straight x minus straight pi over 2 close parentheses less or equal than straight pi Solving space both space you space will space get space two space solution space straight x equals straight pi over 2 space and space straight x equals fraction numerator negative straight pi over denominator 6 end fraction end style
Answered by Expert 8th December 2017, 9:40 AM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Report an issue
Tags: advanced-trigonometric-formulae
Previous Question
Next Question
Your answer has been posted successfully!

Free related questions

RELATED STUDY RESOURCES :
JEE QUESTION ANSWERS

Browse free questions and answers by Chapters

Trending Tags

trigonometric equations Mole concept linear equations trigonometric ratios arithmetic progression circle functions matrix operations integration equivalent resistance

Latest Questions

CBSE X Biology
What is enzyme  
Asked by Sureshgowdayd548 28th October 2020, 10:50 PM
JEE Main Mathematics
The following pseudocode is executed using the “Paragraph words” dataset. At the end of the execution, CountB captures the number of verbs with letter count less than the average letter count of verbs. But the pseudocode may have mistakes in one or more lines. Identify all such lines (if any). It is a Multiple Select Question (MSQ).  Error in Line 4  Error in Line 8  Error in Line 11  Error at Line 12  Error in Line 17  Error at Line 18  Error in Line 21 The following pseudocode is executed using the “Words” table. What will be the value of A at the end of the execution?
Asked by amaladelsingh 28th October 2020, 10:24 PM
CBSE X Biology
I want a brief clarity on Taxonomy
Asked by reenacharan2008 28th October 2020, 9:11 PM

Chat with us on WhatsApp