Question

III. Answer the following: -
27. Using Venn diagram verify that A-(BOC) = (A-B) U (A-C).
28. Let A = {1,2,3}, B = {3,4) and C = {4,5,6}. Find A x( BUC).
29. Show that tan 3x tan 2x tanx = tan 3x -tan 2x - tanx.
2 n(n+1)(2n+1)
30. For all n21, prove that 1 + 2 + 3 +...+ n° = "
31. Find the modulus and argument of
32. Find the general solution of cos 3x +cosx - cos 2x=0.
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Answer 1

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Question No. 28,29,32

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