Question

sec^2x-tan^2x=1

Answer 1

This is true
sec^2 x-1 = tan^2 x
so
sec^2 x-1 = tan^2 x


but what do you have to do, prove it?

Answer 2

Yes! Please prove the identity.

Answer 3

So you have to use a triangle to do this, can you draw it for me really quick please?

Answer 4

I dont think a triangle needs to be used because its just verifying the trig identities

Answer 5

take sinx^2+cosx^2=1 and divide it by cos²(x)/