1. if a cos A+b sin A =c then (a Sin A-b Cos A)²
2. if sin A+sin B =a cosa+cosB=b then cos(A+B) is equal to
3. if 7cosec A-3 cotA =7 then value of 7 cot A-3 Cosec A =

dhirendra nath khatua

8 Years agoGrade 10