Question

if Sin A=1/3 and A+B=90 degree then find cos B

Answer 1

Given
A+B =90 degree
A=90-B
Sin A=sin(90-B)
1/3=cos B [SinA =1/3]
Therefore cosB =1/3

Answer 2

Given

A+B =90 degree

A=90-B

Sin A=sin(90-B)

1/3=cos B [SinA =1/3]

Therefore cosB =1/3