3 years ago

Tan x(cos x - sin x)

Mathematics

1 answer:

Irina-Kira [14]3 years ago

5 0

Answer:ok

Step-by-step explanation:

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Paul [167]

Let

$x = 6 + \dfrac1{2 + \dfrac1{6 + \dfrac1{2 + \cdots}}}$

Then

$x = 6 + \dfrac1{2 + \dfrac1x}$

and solving for x gives

$x = 6 + \dfrac x{2x + 1}$

$x = \dfrac{13x + 6}{2x + 1}$

$x(2x+1) = 13x + 6$

$2x^2 + x = 13x + 6$

$2x^2 - 12x - 6 = 0$

$x^2 - 6x - 3 = 0$

By the quadratic formula,

$x = 3 \pm 2\sqrt{3}$

but x must be a positive number, so only the positive square root solution is valid.

$x = 3 + 2\sqrt{3}$

We identify a = c = 3 and b = 2, so a + b + c = 8.

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3 years ago

Two fraction add up to 9/10. One fraction is 17/20. What is the other fraction

Kazeer [188]

<span> 7/4 = 1.75000 is the other fraction</span>

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3 years ago

Britzy has $50 and wants to buy a new pair of basketball shoes.The shoes cost $45 and have 6% tax.Does britzy have enough money?

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Yes she does have enough

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3 years ago

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lilavasa [31]

The x and y coordinate are switched

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3 years ago

Which of the following are the coordinates of the vertex of Y=3x2 + 3?

Lemur [1.5K]

Answer:

(0,3)

Step-by-step explanation:

y = 3x^2 +3

This is in the form

y = a(x-h)^2 +k

Where the vertex is (h,k)

y = 3(x-0)^2 +3

The vertex is (0,3)

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4 years ago