Ex. No. 1.3
1. Write the negation of each of the following statements:
(i) π is an irrational number.
(ii) 7 is greater than 5.
(iii) Zero is not a complex number.
(iv) It is not true that mangoes are inexpensive.
2. Write the truth value of the negation of each of the following statements.
(i) The sun sets in the east.
(ii) Re (z) ≤ |z| , where z is a complex number.
(iii) Moscow is in America.
(iv) cos2 θ + sin2θ = 1, for all θ Є R.
