Question

if SinA=1/2 and CosB=1/2 then cot (A+B)=?​

Answer 1

Answer:

sinA = 1/2

but we know, sin30= 1/2

i.e. A= 30

cosB=1/2

but we know, cos60= 1/2

i.e. B= 60

Cot(A+B)= Cot90

= 0