Write sec^(2) x=(1)/(cos^2x) in two equivalent forms.

Question

Write
`sec^(2) x=(1)/(cos^2x)` in two equivalent forms.

Answer 1

write sec²x = 1/cos²x in two equivalent forms

sec²x = 1/cos²x

cos²x/cos²x = 1

sec²x = 1 + tan²x