If Tan A + Sin A = m and Tan A - Sin A = n, then show that - m^2 - n^2 = under root mn x 4

If Tan A + Sin A = m and Tan A - Sin A = n, then show that - m^2 - n^2

1.	If Tan A + Sin A = m and Tan A - Sin A = n, then show that - m^2 - n^2 = under root mn x 4
Answer» ?????? Put the values and solve urself