Saved Bookmarks
| 1. |
I : Ifcos A =(3)/(4) " then " cos""(A)/2 cos""(5A)/(2) =-7 II : Ifsin (120^(@) - alpha ) = sin(120^(@) - beta ) and 0 lt alpha , beta lt pi" then " alpha + beta + 60^(@) |
|
Answer» only I is TRUE |
|