Q.No.6. If n(X) = 17,n(Y) = 23 and n(XUY) = 38. Find n(X NY). Where X and Y are two sets. Q.No.7. IfG = {7,8}, H = {5,4,2} Find; G x H and H x G Q.No.8. Insert three numbers between 1 and 256 so that the resulting sequence is a G.P. Q.No.9. Prove that sin(x+y) sin(x-y) tan x + tan y = tan x-tan y Q. No.10. If+= Find the value of 'x' 6! 1 7! 8! 9! (I) 4!3!2! Q.No.11. Simplify; Q. No. 12. Find (a + b) - (a - b)4. (II) 5PA