Mathematical Reasoning

Let \(\Delta\) \(\in\) {\(\wedge\), \(\vee\), \(\Rightarrow\), \(\Leftrightarrow\)} be such that (p \(\wedge\) q) \(\Delta\) ((p \(\vee\) q) \(\Rightarrow\) q) is a tautology. Then \(\Delta\) is equal to :