2 years ago

HURRY!!!! PLS NEED AWMSER IN CLASS I CAN PICK THEM DOWN BELOW

Mathematics

1 answer:

ivann1987 [24]2 years ago

3 0

Answer:

9. 7/2

10. -6

Step-by-step explanation:

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Evaluate cot870°.<br> 1. - sqrt3<br> 2. -1/sqrt3<br> 3. 1/sqrt3<br> 4. sqrt3

ivolga24 [154]

ANSWER

$-\sqrt{3}$

EXPLANATION

The given angle is 870°.

870°-360°-360°=150°

This means that:

870° is coterminal with 150°, hence its terminal side is in the second quadrant.

It makes an acute angle of 30° with the x-axis.

Note that cotangent is negative in the second quadrant,

Hence,

$\cot(870 \degree) = \cot(150 \degree) = - \cot(30 \degree) = - \frac{1}{ \tan(30 \degree) } = - \sqrt{3}$

The first option is correct.

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3 years ago

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Fed [463]

We have that
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2.80------------------X
x=2.80*100/2.45=114.29
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the answer is 14%

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mash [69]

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Arada [10]

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