HSC Science (Electronics) 12th Board ExamMaharashtra State Board
Account
It's free!

User


Login
Create free account


      Forgot password?
Share
Notifications

View all notifications
Books Shortlist
Your shortlist is empty

Solution - Find the general solution of : cos x - sin x = 1. - HSC Science (Electronics) 12th Board Exam - Mathematics and Statistics

Question

Find the general solution of : cos x - sin x = 1.

Solution

cos x − sin x =1
Taking square on both the sides we get,

`therefore (cosx-sinx)^2=1^2`

`thereforecos^2x+sin^2x-2cosxsinx =1`

`therefore 1-2sinxcosx=1`

`therefore 2sinxcosx=0`

`=>sin2x=0`

`=>2x=npi+(-1)^nalpha`

But here α=0

`2x=nπ`

`x=(npi)/2`


The general solution is .

`x=(npi)/2`

  Is there an error in this question or solution?

APPEARS IN

 2014-2015 (March) (with solutions)
Question 3.2.1 | 4 marks
Solution for question: Find the general solution of : cos x - sin x = 1. concept: null - General Solution of Trigonometric Equation of the Type. For the courses HSC Science (Electronics), HSC Science (Computer Science), HSC Science (General) , HSC Arts
S