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ACT Math: Trigonometry Drill 1, Problem 5. Can you simplify the expression?
ACT Math: Trigonometry Drill 2, Problem 1. What function is graphed in the video?
ACT Math Trigonometry Drill 2, Problem 2. Which graph represents the equation shown?
ACT Math 2.4 Trigonometry 257 Views
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Description:
ACT Math: Trigonometry Drill 2, Problem 4. Which formula does the graph in the video represent?
- Trigonometry / Trig graphs
- Product Type / ACT Math
- Foreign Language / Arabic Subtitled
- Foreign Language / Korean Subtitled
- Foreign Language / Spanish Subtitled
- Foreign Language / Chinese Subtitled
- Functions / Model periodic phenomena with trigonometric functions
- Functions / Model periodic phenomena with trigonometric functions
- Trigonometry / Graphing trigonometric functions
Transcript
- 00:02
Here's your shmoop du jour...
- 00:04
The graph represents which formula?
- 00:07
And here are your options...
- 00:11
Well, if we noticed the irregularities in the cos graph, we can get some clues about
- 00:16
the answer. This figure is... really curvy.
Full Transcript
- 00:19
But, because it's so curvy... its period
- 00:22
is probably smaller than usual.
- 00:24
Because it is expressed by a coefficient greater than 1 in the parentheses; only answer choices
- 00:30
A, C, and D have that. As for its amplitude, it seems to reach 3
- 00:35
and negative 3, so there should be a 3 before the cos itself.
- 00:39
Of the three answer choices mentioned before, this is represented in choice A, which turns
- 00:44
out to be our answer. So it's A!
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