Ex. No. 1.3

1. Write the negation of each of the following statements: [video]

(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. [VIDEO]

(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.