What's the answer??

sec^2(-x) - tan^2(-x) = ?

1 Answer
Mar 24, 2018

1

Explanation:

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

tan(-x)=-tan(x) but since its squared it becomes
tan^2(-x)=tan^2(x)

So,
sec^2(-x)-tan^2(-x)=sec^2(x)-tan^2(x)

And sec^2(x)-tan^2(x)=1