<u>Let's consider all the trig identities, to help us with the problem:</u>
⇒ <em>(look at the attached image for help with that)</em>
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<u>After looking at all the trig identity, let's look at the problem given to us</u>:
⇒ cos(θ) =
⇒ we know that sec(θ) = 1 / cos(θ) = 1 / (5/13) = 13/5
<u>Thus</u>: sec(θ) = 13/5, which just so happens to be Choice (D)
<u>Answer:</u> <u>sec(θ) = 13/5</u> or <u>Choice (D)</u>
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Hope that helps!
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