The correct trigonometry identities are sin²x + cos²x = 1 and sec²x - tan²x = 1
What is trigonometry identities?
This are represented in terms of sine, cosine and tangent.
The standard trigonometry identity is expressed as:
sin²x + cos²x = 1
Divide through by cos²x
sin²x/cos²x + cos²x /cos²x = 1/cos²x
tan²x + 1 .= sec²x
sec²x - tan²x = 1
Hence the correct trigonometry identities are sin²x + cos²x = 1 and sec²x - tan²x = 1
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