Answers

2014-03-29T16:09:45+05:30
Sin(2x-200)=cos(2y+20)
or,sin(2x-200)=sin{90-(2x-200)}[since sinA=cos(90-A)]
therefore,90-(2x-200)=2y+20
or,x+y=135
or,tan(x+y)=tan135=1
0