# ACT Math 1.5 Trigonometry

ACT Math: Trigonometry Drill 1, Problem 5. Can you simplify the expression?

 ACT Math Trigonometry ACT Mathematics Trigonometry Foreign Language Arabic SubtitledChinese SubtitledKorean SubtitledSpanish Subtitled Geometry Right Triangles and Trigonometry Language English Language Product Type ACT Math Trigonometry Trig graphsUse of trigonometric identitiesValues and properties of trigonometric functions

### Transcript

00:28

And sec alpha equals one over cos alpha. Now our fraction looks like this: one over

00:36

sin alpha ALL OVER one over cos alpha.

00:40

Now to simplify the sandwich, we multiply one over sin alpha by the reciprocal of one

00:45

over cos alpha to get cos alpha over sin alpha. And since we know that cos alpha over sin

00:52

alpha equals cotangent alpha...

00:54

...we can determine that the answer is B.

00:57

Now we are definitely going to chow down on this thing... as soon as we can get our tongue untied...