According to Hardy–Weinberg principle:
Frequency of dominant allele (A) = p
Frequency of recessive allele (a) = q
Frequency of AA individuals = p × p = p2
Frequency of aa individuals = q × q = q2
Frequency of Aa individuals = 2pq
Total population = 1000
Frequency of AA individuals = p × p = p2 = 360/1000 = 0.36
Frequency of dominant allele (A) = p = 0.6