PLZ HELP E WILL MARK BRAINLIEST Prove that -tan^(2)x + sec^(2)x = 1 is an identity
and if you can show your work that would help

The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.