??? ? + ??? ? = 1, ? = 30° and B is an acute angle, then find the value of B

??? ? + ??? ? = 1, ? = 30° and B is an acute angle, then find the val

1.	??? ? + ??? ? = 1, ? = 30° and B is an acute angle, then find the value of B
Answer» SinA+cosB=1 Sin30+cosB =11/2+cosB=1CosB=1-1/2CosB=2-1/2CosB=1/2CosB= cos60 B=60 Ans Sina + Cosb =1Sin30 +cosb = 11/2+cosb=1Cosb =1-1/2Cosb=1/2We know that cos60 = 1/2=}B= 60 Sin30° + cos 60° = 1(Sin 30° = 1/2 And cos 60° also 1/2)1/2+1/2=2/2 that is 1 B= 60°