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barxatty [35]
3 years ago
8

I NEED HELP PLEASE! THANKS :)

Mathematics
2 answers:
Marianna [84]3 years ago
7 0

Answer:

<em>y = 2 \: cos \:  (\frac{1}{3} x)</em>

<em>option</em><em> </em><em>C</em><em> </em><em>is</em><em> </em><em>the</em><em> </em><em>right</em><em> </em><em>option</em><em>.</em>

<em>Expla</em><em>nation</em><em>:</em>

<em>General</em><em> </em><em>expression</em><em> </em><em>of</em><em> </em><em>a</em><em> </em><em>cosine</em><em> </em><em>function</em><em> </em><em>is</em><em>:</em>

<em>y</em><em>=</em><em>A</em><em> </em><em>cos</em><em> </em><em>k</em><em> </em><em>X</em>

<em>where</em><em> </em><em>A</em><em> </em><em>is</em><em> </em><em>amplitude </em><em>and</em><em> </em><em>2</em><em> </em><em>pi</em><em>/</em><em>k</em><em> </em><em>is</em><em> </em><em>its </em><em>period.</em>

<em>In</em><em> </em><em>our</em><em> </em><em>case</em><em>,</em>

<em>- y = 2 \: cos \:  (\frac{1}{3} x) \:</em>

<em>has</em><em> </em><em>:</em>

<em>amplitude = 2 \\ period = 2\pi \times 3 = 6\pi</em>

<em>hence,</em><em> </em><em>the</em><em> </em><em>right</em><em> </em><em>answer</em><em> </em><em>is</em><em> </em><em> </em><em>of</em><em> </em><em>option</em><em> </em><em>C</em>

<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em><em>.</em><em>.</em><em>.</em>

<em>Good</em><em> </em><em>luck</em><em> on</em><em> your</em><em> assignment</em><em>.</em><em>.</em>

Gala2k [10]3 years ago
6 0

Answer:

The third option should be correct. Goodluck!

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