Saved Bookmarks
| 1. |
If sin (A+B) = 1 and cos(A-B)=√3/2, 0 B, find A and B |
|
Answer»
sin(A+B)=1 cos(A-B)=√3/2 We KNOW sin-¹ =90 A+B=9 _ _ _ _(1) cos (A-B)=root 3/2 A-B=cos-¹ root 3/2 We know cos-¹ root 3/2=30 A-B=30 _ _ _ _ _ (2) Solve (1) & (2) A+B=90 A-B=30 add 2A=120 A=60 B=30 (Ans)
|
|