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2 years ago

10

Given that sin? x + cos2x = 1

1 answer:

Pachacha [2.7K]2 years ago

8 0

Answer:

the answer is

$\frac{ \sqrt{23} }{5}$

cause sin²x= 2/25

so cos²x would be 1-2/25= 23/25

then cos x is what I wrote as the answer

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Which is true about the area of the parallelogram?

Colt1911 [192]

Answer:

area is 2 dimensional lika a carpet and a area rug. a parallelogram 4 sided-shape formed by 2 pairs of parrel lines. opposite sides are equal in lenght and opposite are equal in measure. to find the area of a parallegram, multiply the by the base by the height

Explanation:

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4 years ago

Read 2 more answers

1. <br> Which is the graph of the exponential function y = 0.5(0.5)x?

zubka84 [21]

Answer:

The answer is B

Step-by-step explanation:

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3 years ago

56. How many tangent lines to the curve <img src="https://tex.z-dn.net/?f=y%3Dx%20%2F%28x%2B1%29" id="TexFormula1" title="y=x /(

PIT_PIT [208]

There are 2 tangent lines that pass through the point

$y=\frac{1}{(-1+\sqrt{3)^2} } (x-1)+2$

and

$y=\frac{1}{(-1-\sqrt{3)^2} } (x-1)+2$

Explanation:

Given:

$y=\frac{x}{x+1}$

The point-slope form of the equation of a line tells us that the form of the tangent lines must be:

$y=m(x-1)+2$ $[1]$

For the lines to be tangent to the curve, we must substitute the first derivative of the curve for $m$ :

$\frac{dy}{dx} =\frac{d(x)}{dx}(x+1)-x^\frac{d(x+1)}{dx} \\ \\$

$\frac{dy}{dx} =\frac{x+1-x}{(x+1)^2}$

$\frac{dy}{dx}= \frac{1}{(x+1)^2}$

$m=\frac{1}{(x+1)^2}$ $[2]$

Substitute equation [2] into equation [1]:

$y=\frac{x-1}{(x+1)^2}+2$ $[1.1]$

Because the line must touch the curve, we may substitute $y=\frac{x}{x+1}:$

$\frac{x}{x+1}=\frac{x-1}{(x+1)^2}+2$

Solve for x:

$x(x+1)=(x-1)+2(x+1)^2$

$x^2+x=x-1+2x^2+4x+2$

$x^2+4x+1$

$x\frac{-4±\sqrt{4^2-4(1)(1)} }{2(1)}$

$x=-2$ ± $\sqrt{3}$

$x=-2$ ± $\sqrt{3}$ <em> </em> $and$ $x=-2-\sqrt{3}$

There are 2 tangent lines.

$y=\frac{1}{(-1+\sqrt{3)^2} } (x-1)+2$

and

$y=\frac{1}{(-1-\sqrt{3)^2} } (x-1)+2$

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3 years ago

What is theoretical vs experimental probability? Please help!

mrs_skeptik [129]

Answer:

See down below.

Step-by-step explanation:

Theoretical probability is what we expect to happen. For example, we do a test of flipping a coin. You know that its either gonna be heads or tails.

Experimental probability is what actually happens when we try it out. It occurs when we are doing an experiment and then something happens.

Hope this helps!

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3 years ago

Hey guys please help me on this I will give you brainliest

dangina [55]

Answer:

1. 15-5x 2. 54+18x 3. 3x+15 4. 28x+56

Step-by-step explanation:

I dont get if you need this or the real answer if you need the real answer let me know and I will give you the real answer. :) Have a good day!

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3 years ago