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2 years ago

What is a valedictorian?

Mathematics

2 answers:

Strike441 [17]2 years ago

8 0

Step-by-step explanation:

according to Oxford learner's dictionary:

the student who has the highest grades in a particular group of students and who gives the valedictory speech at a graduation ceremony compare salutatorian.

it means to have quality speech

exis [7]2 years ago

4 0

Answer:

The valedictorian is the person who has the highest academic achievements in their graduating class not to mention they get to deliver the valedictory speech.

Step-by-step explanation:

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2 years ago

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(a)

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or, via symmetry

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(b)

By the chain rule:

$\displaystyle \frac{dy}{dx} = \frac{ dy/ d\theta}{ dx/ d\theta}$

For polar coordinates, x = rcosθ and y = rsinθ. Since
r = 3 + 2cosθ, it follows that

$x = (3 + 2\cos\theta) \cos \theta \\ 
y = (3 + 2\cos\theta) \sin \theta$

Differentiating with respect to theta

$\begin{aligned}
\displaystyle \frac{dy}{dx} &= \frac{ dy/ d\theta}{ dx/ d\theta} \\
&= \frac{(3 + 2\cos\theta)(\cos\theta) + (-2\sin\theta)(\sin\theta)}{(3 + 2\cos\theta)(-\sin\theta) + (-2\sin\theta)(\cos\theta)} \\ \\
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2/3 is the slope

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