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3 years ago

6cos(20πt-π)+6√3cos(20πt-π\2)

Mathematics

1 answer:

juin [17]3 years ago

5 0

Answer:

Answer is -6t

Step-by-step explanation:

${ \tt{ = (6 \cos(20\pi t) \cos(\pi) + 6\sin(20\pi t) \sin(\pi) ) + 6 \sqrt{3} ( \cos(20\pi t) \cos( \frac{\pi}{2} ) + \sin(20\pi t) \sin( \frac{\pi}{2} )) }} \\ = { \tt{ (- 6t + 0) + (0 + 0)}} \\ = { \tt{ - 6t}}$

Note that π is 180°

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Roman55 [17]

Answer:

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Step-by-step explanation:

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3 years ago

What is the vertex of the following function? f(x) = 2(x+8)^2 - 2

netineya [11]

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2 years ago

Jaylo bought a television priced at $349. She received a 20% discount and paid a 7% sales tax. What is the total price of the te

maw [93]

Answer:

Step-by-step explanation:

349 ---100%

x ------ 20%

x= (349×20)÷100

x=69.8

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3 years ago

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Anika [276]

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Step-by-step explanation:

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It is necessary to note that one of the roots is a complex number and root of complex number always in pair of the conjugate to each other.

Since x=6+i

Conjugate of (6+i) is (6-i)

Therefore, (6-i) is 3rd required root of a polynomial

The correct answer is A). None

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4 years ago