(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The general solution of sinx.siny=1 is

1.x=n(pi)+(pi/2)(-1)^n+1 y=m(pi)+(pi/2)(-1)^m+1

2.x=(4n+1)(pi/2) y=(4m+1)(pi/2)

3.x=(4n-1)(pi/2) y=(4m-1)(pi/2)

where n,m belong to I

2. Relevant equations

Answer- 2 and 3

3. The attempt at a solution

This is possible only if sinx=siny=1 or sinx=siny= -1

Substituting arbitrary values of n,m in 1st choice.....we get correct answer

but 1st choice is not included in correct answers

WHY?

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# Homework Help: Trigonometric equations

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