New Zealand - Whakatane - Trident High School - Form 7 CO - 1991 Do you have more information about the school or the people in this photo? Please use the comment section below to share. To search for other photos from this school, please type the schools name in to our search engine. Trident High School - Trident High School is a state coeducational secondary school located in Whakatāne - The school opened in February 1973 as the town's second secondary school, alongside Whakatane High School