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natulia [17]
4 years ago
12

What is pi/π used for in math

Mathematics
2 answers:
vovikov84 [41]4 years ago
8 0

Answer:

In basic mathematics, pi is used to find the area and circumference of a circle. Pi is used to find area by multiplying the radius squared times pi. So, in trying to find the area of a circle with a radius of 3 centimeters, π32 = 28.27 cm.

TEA [102]4 years ago
3 0

Answer:

Succinctly, pi or π is the ratio of the circumference of any circle to the diameter of that circle.

Have A Nice Day!!!!!!

:))))))

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PLS HELP, HAVE A GOOD DAY
Snowcat [4.5K]

Answer:

\frac{\pi }{4} +\frac{\pi }{2} n,  where n∈Z.

Step-by-step explanation:

2sin²x-1; ⇒ sin²x=1/2;

\left[\begin{array}{ccc}sinx=-\frac{1}{\sqrt{2}} \\sinx=\frac{1}{\sqrt{2}} \end{array} \ = > \ \left[\begin{array}{ccc}x=(-1)^{l+1}\frac{\pi }{4}+\pi l \\x=(-1)^k\frac{\pi }{4}+\pi k \end{array} \ = > x=\frac{\pi }{4} +\frac{\pi }{2}n, \ n-Z.

4 0
2 years ago
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Find, correct to four decimal places, the length of the curve of intersection of the cylinder 4x2 + y2 = 4 and the plane x + y +
kolbaska11 [484]
4x^2+y^2=4\iff x^2+\left(\dfrac y2\right)^2=1
x+y+z=9\iff z=9-x-y

Let x=\cos t and y=2\sin t. Then the cylinder is given when we take 0\le t\le2\pi.

The cylinder's equation is independent of z, which means the intersection is completely determined by the value of z in the plane equation. So the intersection can be described by the vector function \mathbf r(t)=\langle\cos t,2\sin t,9-\cos t-2\sin t\rangle.

The length of the intersection curve C is given by the line integral

\displaystyle\int_C\mathrm d\mathbf r=\int_{t=0}^{t=2\pi}\|\mathbf r'(t)\|\,\mathrm dt
=\displaystyle\int_0^{2\pi}\sqrt{\cos^2t+4\sin^2t+(9-\cos t-2\sin t)^2}\,\mathrm dt
\approx57.4449
5 0
3 years ago
Simplify the expression.<br> 3x + 3x
OverLord2011 [107]
Here, just add the coefficients. 3x + 3x = 6x.
4 0
3 years ago
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PLS HELP ! a line passes theoufh the point (0,2) and has a slope of -1/2 what is the equation od the line
klasskru [66]
I think the answer is B
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3 years ago
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Generate a plan and describe the steps needed to solve the equation. <br><br> 34=-(m+3)
ki77a [65]
Alright to solve this problem you must start by distributing the -1 to everything in the parenthesis. To distribute, multiply both the m variable and the 3 by a -1.
This simplification results in:
34 = -m - 3

Next, isolate your -m. To do this, add 3 on both sides of the equal sigh to keep everything balanced.
This gives you:
37 = -m

Since you want to find the value of m and not -m, flip the sign of the value in your answer by moving the negative parenthesis to the integer rather than the variable.
Like this: -(37) = m

Then, distribute the negative to your integer value.
Your simplified equation now looks like this:
-37 = m

This leaves your final answer value for m as a -37.

I hope this is correct and helpful to you! :)
6 1
3 years ago
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