Is this identity problem right?

[Marc]

This is the identity problem
sin^2(x)+tan^2(x)+cos^2(x)=sec^2(x)

sin^2(x)+cos^2(x)=1
tan^2(x)+1=sec^2(x)

sec^2(x)=sec^2(x)

 

[tkhunny]

With what are you struggling? It look slike you have it. Maybe you just didn't believe it was that easy?