Question

Will Medal!
Is cos^2x(1+ tan^2x) = 1 and Identitie

Answer 1

what identities do you know about tan^2 x ?

Answer 2

Honestly nun I just know Identities are always true

Answer 3

you can use
1+ tan^2 x = sec^2 x

and
sec x = 1/cos x

Answer 4

and That makes it an Identitie?

Answer 5

doesn't it ?

= cos^2 x (sec^2 x)
= cos^2 x * (1/cos^2 x)
= 1