If ' \( p \) ' is any statement and ' \( t \) ' represent a 'tautology', ' \( f \) ' represents ....

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If ' \( p \) ' is any statement and ' \( t \) ' represent a 'tautology', ' \( f \) ' represents a contradiction then which of the
\( \mathrm{P} \)
following is (are) true?
W
(1) \( p \vee \sim p \equiv t \)
(2) \( p \wedge \sim p \equiv f \)
(3) \( \sim \sim p \equiv p \)
(4) \( \sim f \equiv t \)


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