MAHARASHTRA: 6TH 7TH 8TH 9TH 10TH 11TH 12TH
AP BOARD: 8TH 9TH 10TH
TAMIL-NADU: 8TH 9TH 10TH 11TH 12TH
GUJARAT BOARD: 10TH
CBSE: 12TH 10TH 9TH 8TH ICSE-BOARD ISC-BOARD
GRAMMAR & WRITING SKILLS BOARD PAPER SOLUTIONS: 2019 2020
Prove that the following statement pattern is a tautology.
(~ p ∨ ~ q) ↔ ~ (p ∧ q)
All the truth values in the last column are T. Hence, it is a tautology.