Question

if sin(a)+cos(b)=2 then what is the value of sin(a+b)+cos(a+b)​

Answer 1

Answer:

Since there is know extra information is given about A and B so we assume that both of them takes their values independently... Hence -2 <=Sin A + Sin B <=2 ; So Sin A = 1 and Sin B = 1 ; So both Cos A and Cos B both takes values zero so their sum ie.