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

For Study plan details

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

Franchisee/Partner Enquiry (South)

Franchisee/Partner Enquiry (North, West & East)

OR

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

9372462318 / 9987178554

Mon to Sat - 10 AM to 7 PM

please solve the question

Asked by jaychandran1967 7th December 2017, 5:36 PM
Answered by Expert
Answer:
begin mathsize 16px style cos 20 degree plus 2 sin squared 55 degree minus square root of 2 sin 65 degree
cos 20 degree plus 1 minus cos open parentheses 2 cross times 55 degree close parentheses minus square root of 2 sin 65 degree space space space space space space space space space space space space space space Using space 1 minus cos 2 straight theta equals 2 sin squared straight theta
cos 20 degree plus 1 minus cos 110 degree minus square root of 2 sin 65 degree space
cos 20 degree plus 1 minus cos open parentheses 90 degree plus 20 degree close parentheses minus square root of 2 sin 65 degree space
cos 20 degree plus 1 plus sin 20 degree minus square root of 2 sin 65 degree space
To space find space sin 65 degree equals sin left parenthesis 45 degree plus 20 degree right parenthesis
equals sin 45 degree cos 20 degree plus cos 45 degree sin 20 degree
Putting space the space values space and space simplifying space you space will space get space answer space as space 1. end style
Answered by Expert 8th December 2017, 9:18 AM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Your answer has been posted successfully!
JEE QUESTION ANSWERS

Chat with us on WhatsApp