Question

How do you simplify `cos^2(1+tan^2x)`?

Answer 1

Simplify: `cos^2 x(1 + tan^2 x)`

Explanation:

`cos^2 x (1 + tan^2 x) = cos^2 x(1/cos^2 x) = 1`

Reminder --> trig identity `(1 + tan^2 x) = 1/cos^2 x`