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2 years ago

6

Why is my foot a foot long?

2 answers:

lbvjy [14]2 years ago

8 0

Answer:

King George had feet that had a foot long

Step-by-step explanation:

Back in the old-old-OLDEN days, King George had a foot (obviously). And it was a foot long!

fiasKO [112]2 years ago

4 0

Answer:

It's not.

Step-by-step explanation:

The measure 'foot' came from the French Emperor Charlegmane. He proclaimed that the length of his foot is now a measurement. Unless your foot is exactly as big as Charlegmane's foot, it's not a foot.

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Sin theta+costheta/sintheta -costheta+sintheta-costheta/sintheta+costheta=2sec2/tan2 theta -1

sleet_krkn [62]

$\dfrac{sin\theta + cos\theta}{sin\theta-cos\theta}+\dfrac{sin\theta-cos\theta}{sin\theta+cos\theta}=\dfrac{2sec^2\theta}{tan^2\theta-1}$

From Left side:

$\dfrac{sin\theta + cos\theta}{sin\theta-cos\theta}\bigg(\dfrac{sin\theta+cos\theta}{sin\theta+cos\theta}\bigg)+\dfrac{sin\theta-cos\theta}{sin\theta+cos\theta}\bigg(\dfrac{sin\theta-cos\theta}{sin\theta-cos\theta}\bigg)$

$\dfrac{sin^2\theta+2cos\thetasin\theta+cos^2\theta}{sin^2\theta-cos^2\theta}+\dfrac{sin^2\theta-2cos\thetasin\theta+cos^2\theta}{sin^2\theta-cos^2\theta}$

NOTE: sin²θ + cos²θ = 1

$\dfrac{1 + 2cos\theta sin\theta}{sin^2\theta-cos^2\theta}+\dfrac{1-2cos\theta sin\theta}{sin^2\theta-cos^2\theta}$

$\dfrac{1 + 2cos\theta sin\theta+1-2cos\theta sin\theta}{sin^2\theta-cos^2\theta}$

$\dfrac{2}{sin^2\theta-cos^2\theta}$

$\dfrac{2}{\bigg(sin^2\theta-cos^2\theta\bigg)\bigg(\dfrac{cos^2\theta}{cos^2\theta}\bigg)}$

$\dfrac{2sec^2\theta}{\dfrac{sin^2\theta}{cos^2\theta}-\dfrac{cos^2\theta}{cos^2\theta}}$

$\dfrac{2sec^2\theta}{tan^2\theta-1}$

Left side = Right side <em>so proof is complete</em>

8 0

2 years ago

Read 2 more answers

(2x-3)(3x+4) expand and simplify

elixir [45]

Answer:

6x² - x - 12

Step-by-step explanation:

Each term in the second factor is multiplied by each term in the first factor.

(2x - 3)(3x + 4)

= 2x(3x + 4) - 3 (3x + 4) ← distribute both parenthesis

= 6x² + 8x - 9x - 12 ← collect like terms

= 6x² - x - 12 ← in expanded form

5 0

2 years ago

the ratio of the number of cookies baked by anna, danny, and liesa was 5:4:2. after anna ate 30 of her own cookies and danny ate

Dmitrij [34]

Cookies because of x, x = 14

7 0

1 year ago

If the ratio of the purple flower

muminat

Im not positive but im pretty sure it's 27

4 0

2 years ago

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What is the slope of the line that’s passes through the points (-3,5) and (1,7)

Blababa [14]

Answer:

3 / 4

Step-by-step explanation:

Slope: y2 -y1 / x2 - x1

y2 - y1: 7-5: 3

x2 - x1: 1 - (-3) = 1 + 3 = 4

3/ 4 is the slope

8 0

2 years ago