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3 years ago

How do you find the volume of a cube

Mathematics

2 answers:

emmainna [20.7K]3 years ago

7 0

To find the volume of a cube you multiply the length of any side by its self twice <span />

Alja [10]3 years ago

6 0

Since a cube has equal measurements in all sides, the formula for the volume of a cube is: V=a*a*a, or V=a^3 (raised to the third power)

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16) Please help with question. WILL MARK BRAINLIEST + 10 POINTS.

Katyanochek1 [597]

We will use the sine and cosine of the sum of two angles, the sine and consine of $\frac{\pi}{2}$ , and the relation of the tangent with the sine and cosine:

$\sin (\alpha+\beta)=\sin \alpha\cdot\cos\beta + \cos\alpha\cdot\sin\beta

\cos(\alpha+\beta)=\cos\alpha\cdot\cos\beta-\sin\alpha\cdot\sin\beta$

$\sin\dfrac{\pi}{2}=1,\ \cos\dfrac{\pi}{2}=0$

$\tan\alpha = \dfrac{\sin\alpha}{\cos\alpha}$

If you use those identities, for $\alpha=x,\ \beta=\dfrac{\pi}{2}$ , you get:

$\sin\left(x+\dfrac{\pi}{2}\right) = \sin x\cdot\cos\dfrac{\pi}{2} + \cos x\cdot\sin\dfrac{\pi}{2} = \sin x\cdot0 + \cos x \cdot 1 = \cos x$

$\cos\left(x+\dfrac{\pi}{2}\right) = \cos x \cdot \cos\dfrac{\pi}{2} - \sin x\cdot\sin\dfrac{\pi}{2} = \cos x \cdot 0 - \sin x \cdot 1 = -\sin x$

Hence:

$\tan \left(x+\dfrac{\pi}{2}\right) = \dfrac{\sin\left(x+\dfrac{\pi}{2}\right)}{\cos\left(x+\dfrac{\pi}{2}\right)} = \dfrac{\cos x}{-\sin x} = -\cot x$

3 0

3 years ago

Which of the following is not true?

Natasha2012 [34]

Answer:

d) 1/2 ÷ 4 = 1/2 • 4/1

Step-by-step explanation:

when dividing fractions use keep change flip (keep the first fraction, change the sign to multiplication, flip the second fraction)

when multiplying just multiply straight across

6 0

3 years ago

A ream of paper weighs 5 pounds and has dimensions of 8.5 inches by 11 inches by 2 inches.

devlian [24]

S = 2 (lw + lh + hw)
S = 2 ((8.5)(11) + (8.5)(2) + (11)(2))
S = 2 (93.5 + 17 + 22)
S = 2 (132.5)
S = 265 sq in

6 0

3 years ago

What is (-s - 5) + (-2s + 2)?

Studentka2010 [4]

The answer is (−3s-3)

4 0

3 years ago

M divided by 4 plus 3 equals -1

Pepsi [2]

Answer:

m= -16

Step-by-step explanation:

m/4+3= -1

-3 -3

m/4= -4

*4 *4

m= -16

7 0

2 years ago