Help, I need a complicated trigonometry question

[CountessDracula]

plus the answer

To wind someone up

TIA

try this:

1 + tan2x ? cos2x ? cos2x tan2x is equivalent to which of the following expressions?
(A) 1 ? sec2x
(B) cos2x
(C) tan2x
(D) cot2x
(E) cot2x

answer C

There are two easy ways to simplify the given expression. Both involve using identities. The first way is to immediately factor the expression into (1 ? cos2x)(1 + tan2x). Then, using the identities 1 ? cos2x = sin2x and 1 + tan2x = sec2x, the expression is simplified to sin2(x)sec2(x), which can be furthered simplified:

The other way takes slightly longer but requires the use of fewer identities.

the 2 are to the power ofs not just 2's

Thanks so much

eg ²