Question

- tan2x + sec2x = 1

Answer 1

@Luigi0210

Answer 2

There is an identity, tan²x+1=sec²x

tan²x+1=sec²x subtract tan²x from both sides, and you will get...
1=sec²x-tan²x

See? it is in fact equal to 1.

Answer 3

start with

\[\sin^2 + \cos^2 = 1\]

divide every term by

cos^2....

then rewrite it with the trig ratios on the same side of the equation