Question
Given that [sin(A-B)/cos(A+B)]=1/3[tan(A-B)], find the values of cosB if sinA=1/2
Answers
sinA = 1/2
cosA = √3/2
tanA = 1/√3
plug those in and see where it takes you
cosA = √3/2
tanA = 1/√3
plug those in and see where it takes you