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3 years ago

64 percent rounds to the nearest

Mathematics

1 answer:

Serggg [28]3 years ago

5 0

Tenth have to make answer longer for this app sorry

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Find [4(cos15° + isin15°)]^3 and express it in a + bi form.

arsen [322]

Answer:

see explanation

Step-by-step explanation:

Using De Moivre's theorem

Given

[ 4(cos15° + isin15° ) ]³, then

= 4³ [ cos(3 × 15°) + isin(3 × 15°) ]

= 64 (cos45° + isin45° )

= 64 ( $\frac{\sqrt{2} }{2}$ + $\frac{\sqrt{2} }{2}$ i )

= 64 ( $\frac{\sqrt{2} }{2}$ (1 + i) )

= 32 $\sqrt{2}$ (1 + i)

= 32 $\sqrt{2}$ + 32 $\sqrt{2}$ i

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3 years ago

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nlexa [21]

Answer:

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Step-by-step explanation:

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3 years ago

Carlos has scored 83, 65, and 94 on his previous three tests. What score does he need on his next test so that his average (mean

Brilliant_brown [7]

Answer:

Carlos need to score 95

Step-by-step explanation:

<u>Let the score is x. The average is:</u>

(83 + 56 + 94 + x)/4 = 82
x + 233 = 4*82
x = 328 - 233
x = 95

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Answer:

The vertex is 4

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Answer:

Step-by-step explanation:

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