ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Right Triangles and Trigonometry Videos 37 videos
Verifying trig identities is important, especially when you're about to let one of them into the country—which is why they should keep their pass...
Sine is the opposite over the hypotenuse; cosine is the adjacent over the hypotenuse; and tangent is the opposite side over the adjacent side....
FYI: cats don't like to get wet. Okay, so that fact won't be relevant every time you solve trig equations, but it happens to be this time.
ACT Math 3.4 Trigonometry 218 Views
Share It!
Description:
ACT Math: Trigonometry Drill 3, Problem 4. Which of the following answer choices is true?
- Trigonometry / Trig identities
- Product Type / ACT Math
- Foreign Language / Arabic Subtitled
- Foreign Language / Korean Subtitled
- Foreign Language / Spanish Subtitled
- Foreign Language / Chinese Subtitled
- Trigonometry / Values and properties of trigonometric functions
- Trigonometry / Use of trigonometric identities
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
Full Transcript
- 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.
Related Videos
ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?
ACT Math: Intermediate Algebra: Drill 3, Problem 1. Find the fifth number in the series.
ACT Math: Plane Geometry Drill 3, Problem 1. What is the area of the trapezoid shape in the video?
Haven't you always wondered how much cardboard it takes to encase a trunk warmer for your pet elephant?
Want to figure out the area and perimeter of irregular shapes? Break them down into regular shapes. For example, a flower can be broken down into s...