Question

8(A-B) =1 cas(A+B) =45 find A and B

Answer 1

Answer:

Given,

cos(A+B)=0 and sin(A−B)=1/2

cos(A+B)=cos(90

o

) and sin(A−B)=sin(30

o

)

Since A,B are acute

or, A+B=90

o.(1) and A−B=30

o2)

Solving from (1) and (2) we get,

A=60

o

and B=30

o

.