# Solutions of equation - I.S.I. 2018 Problem 1

Find all pairs ( (x,y) ) with (x,y) real, satisfying the equations $$\sin\bigg(\frac{x+y}{2}\bigg)=0~,~\vert x\vert+\vert y\vert=1$$

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### 8 comments on “Solutions of equation - I.S.I. 2018 Problem 1”

1. Faiz says:

Can u please tell which book of yaglom?as he has written many books i guess.
Thnx

1. Ashani Dasgupta says:

I think the name of the book is Challenging Mathematical Problems with elementary solutions. There are about 300 problems in the book and somewhere at the end of it, this problem is given

1. Faiz Akhtar says:

Sorry again for bothering you but i culdn’t find the problem in yaglom.can u please help with page no.!

1. Ashani Dasgupta says:

Faiz, let me double check

1. Faiz Akhtar says:

2. Suman Saurav says:

can u tell which book is best for ISI(B.math) entrance examination

1. Ashani Dasgupta says:

Test of Mathematics

3. Rohan Bhattacharya says:

Please give the solution of problem no 5,bstat 2018

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