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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 4.5 Trigonometry 253 Views
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Description:
ACT Math: Trigonometry Drill 4, Problem 5. What is the equation of the graph?
Transcript
- 00:02
For a good time, solve this shmoopy question.
- 00:05
Which is the equation of the graph below?
- 00:07
And here are the choices:
- 00:11
What we have here looks like a sin curve, since its initial portion moves through the
- 00:16
origin (0, 0). That leaves us with the first three answer choices.
Full Transcript
- 00:20
Next, for the amplitude, the graph moves three up and three down, so it's... 3. Simple
- 00:27
as that. We're down to answers B and C now. Finally, we have to take into account the
- 00:32
period of the graph.
- 00:34
The sin wave completes its first full cycle at π, which is twice
- 00:39
as fast as a normal sin wave. That means that the coefficient in the parentheses
- 00:43
should be 2. We have our match -- answer B.
- 00:47
Now wave bye-bye to the wave...
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