3 years ago

Help me please I’m very confused

Mathematics

1 answer:

nadezda [96]3 years ago

4 0

Answer:

$Arc \ length = 2\pi r\frac{\theta}{360} =2\pi 5\frac{30}{360} =10\pi \frac{1}{12} =\frac{5}{6} \pi =2.62units$

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Write -6 - 8i in polar form<br> Appreciate any help thank you so much!

Temka [501]

-6 = r cos α and -8 = r sin α

r = sqrt( 6^2 + 8^2) = sqrt 100 = 10

α = arctan ( -8/-6) = arctan (4/3) = 53.13 degrees

polar firm = r ( cos α + i sin α)
= 10(cos 53.18 + i sin 53.18)

its been a long time but ui think thats correct

3 0

3 years ago

An arithmetic sequence is defined by the general term tn = 19 - (n - 1)18, where n ∈N and n ≥ 1. What is the recursive formula o

vovikov84 [41]

$t_n=19-18(n-1)$
$t_{n-1}=19-18(n-2)$
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So the recursive formula is

$\begin{cases}t_1=19\\t_n=t_{n-1}-18&\text{for }n>1\end{cases}$