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noname [10]
3 years ago
7

Write the complex number in the form a+bi . 8(cos30+isin30)

Mathematics
2 answers:
BabaBlast [244]3 years ago
4 0
<span>8.cos(30)=a and 8sin30=b</span>
Sophie [7]3 years ago
3 0
Hello,

since sin 30°=1/2 and cos 30°=√3/2
then
8(cos 30+i sin 30°)=8*(√3/2+i/2)=4√3+4i
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Dylan just started a running plan where he runs 14 miles the first week and then increases the number of miles he runs by 10% ea
Vladimir79 [104]

Answer:

36 miles

Step-by-step explanation:

Given - Dylan just started a running plan where he runs 14 miles the first

            week and then increases the number of miles he runs by 10% each

            week.

To find - If he keeps up this plan for 11 weeks, how many total miles would  

              Dylan have run ?

Proof -

1st week = 14 miles

2nd week = 14 + 10% of 14 = 14 + 1.4 = 15.4

3rd week = 15.4 + 10% of 15.4 = 15.4 + 1.54 = 16.94

4th week = 16.94 + 10% of 16.94 = 16.94 + 1.694 = 18.634

5th week = 18.634 + 10% of 18.634 = 18.634 + 1.8634 = 20.4974

6th week = 20.4974 + 10% of 20.4974 = 20.4974 + 2.04974 = 22.54714

7th week = 22.54714 + 10% of 22.54714 = 22.54714 + 2.254714 = 24.801857

8th week = 24.801857  + 10% of 24.801857  = 24.801857  + 2.4801857  = 27.2820427

9th week = 27.2820427  + 10% of 27.2820427  = 27.2820427+ 2.72820427  = 30.01024697

10th week = 30.01024697  + 10% of 30.01024697  = 30.01024697 + 3.001024697  = 33.01127167

11th week = 33.01127167  + 10% of 33.01127167  = 33.01127167 + 3.301127167  = 36.31239884 ≈ 36

∴ we get

Total miles Dylan would run = 36 miles.  

8 0
3 years ago
(f+g)(4)<br><br><br><br>I really don't know what to do?? or how to start ??
olganol [36]

(f+g)(x)=x^2-2x+2+1-3x=x^2-5x+3\\\\ (f+g)(4)=4^2-5\cdot4+3=16-20+3=-1

8 0
4 years ago
A retired math teacher takes his shopping. he tells nephew that they can spend x dollars and 14x=931 . What operation does the n
navik [9.2K]
The nephew would need to use division to isolate x giving him $66.50 to spend
8 0
3 years ago
If a number has an infinite amount of 0's on the end of it, can I shorten it to just one 0?
Alex777 [14]

yea just put a line over the 0 to indicate it's infinite

7 0
3 years ago
Send help my way please y'all so smart
Fofino [41]
Graph A is the correct one
3 0
2 years ago
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