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3 years ago

I need help..

Mathematics

1 answer:

Rus_ich [418]3 years ago

6 0

Answer:

A = 2, B = 1, C = 5, D = 3, E = 4

Step-by-step explanation:

Variety of workings including

Opposite angles are equal

90 degrees on a right angle

180 degrees in a straight line

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Which number is not in scientific notation?

Hitman42 [59]

Answer:

A 9 ⋅ 1019

B 7.8 ⋅ 106

C 1.45 ⋅ 10−7

D 0.33 ⋅ 10−15

Step-by-step explanation:

A 9 ⋅ 1019

B 7.8 ⋅ 106

C 1.45 ⋅ 10−7

D 0.33 ⋅ 10−15

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3 years ago

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Solution

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1 year ago

Greatest to least 4.854; 4,9; 4.124; 4.78

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9,4.854,4.78,4.124,4

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3 years ago

Prove that cos^3x+3cos2x= 4 (cos^6 x-sin^6x)

gavmur [86]

But this isn't true... If $x=\dfrac\pi2$ , you have

$\cos^3\dfrac\pi2+3\cos\pi=0-3=-3$
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but of course $-3\neq-4$ .

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3 years ago

Find the exact values of the following,giving your answers as fractions

Vsevolod [243]

Answer:

(a) $3^{-2}=\frac{1}{9}$

(b) $4^{-3}=\frac{1}{64}$

Step-by-step explanation:

To find the exact value in fractions of the followings:

Exponents also called powers its a way of expressing a number multiplied by itself by a certain number of times.

Using $a^{-m}= \frac{1}{a^m}$ .......[1]

(a)

Fraction represents a part of a whole or more generally, any number of equal parts.

$3^{-2}$ = $\frac{1}{3^2}=\frac{1}{3\times 3}=\frac{1}{9}$ [ Using [1]]

(b)

$4^{-3}$ = $\frac{1}{4^3} =\frac{1}{4\times 4\times 4}=\frac{1}{64}$ [ Using [1]]

(c)

$2^{-6}$ = $\frac{1}{2^6} =\frac{1}{2\times 2\times 2\times 2\times 2\times 2}=\frac{1}{64}$ [ Using [1]]

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3 years ago