Answers

2015-06-18T19:42:34+05:30
Sin(a+b)= sin 60
so a+b=60 
cos(a-b)=cos 30
so a-b is 30 
a+b=60 
 a-b=30
2a ≡90
a is 45
b is 15
 A:B is 3:1

0