Question

Which expression is equivalent to sec(–θ)?

Answer 1

HI!!

Answer 2

we got some choices?

Answer 3

like\[\frac{1}{\cos(\theta)}\] or just say \(\sec(\theta)\)

Answer 4

sec θ

-sec θ

1/−cosθ

csc θ

Answer 5

secant is the reciprocal of cosine
cosine is even, so secant is even
that means
\[\sec(-\theta)=\sec(\theta)\]