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ACT Math 3.4 Trigonometry 218 Views


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Description:

ACT Math: Trigonometry Drill 3, Problem 4. Which of the following answer choices is true?

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Transcript

00:02

Here's your shmoop du jour, brought to you by Shortcuts. Pay no attention to the glowing

00:08

eyes. This way is definitely quicker. Which of the following answer choices is true?

00:18

Well sorry if you were looking for a shortcut to the answer to this problem...there really isn't one...

00:23

We just have to know our trig identities,

00:25

So let's start with A. Sin alpha equals 1

00:30

over cosecant alpha. Remember that cosecant is the reciprocal of

00:36

sine. So sin alpha equals 1 over cosecant alpha. This one's true.

00:43

Answer choice B...secant equals 1 over cosine yup. Secant is the reciprocal of cosine. Check!

00:50

Ok, last one. Tangent alpha equals sin alpha over cosine alpha. Again, we just have to

00:57

know it but yeah, this one works, too.

01:00

Because A, B, and C are all correct. Answer choice E is the one we want.

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