How to Find Cosine of Pi Using the 360 Circle and Quadrants?

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In summary, "Pi=90" is a mathematical equation that represents the relationship between the circumference and diameter of a circle. The value of pi is approximately 3.14159, and when multiplied by 90, it gives you the circumference of a circle with a diameter of 90 units. Pi is a fundamental constant in mathematics and science, and it is used to solve problems related to circles, spheres, and other curved shapes. It is also commonly approximated to 3.14159 or 22/7 and can be calculated using various mathematical methods. In real-life applications, pi is used in fields such as architecture, engineering, and technology to calculate distances and create accurate representations of curved objects.
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afcwestwarrior
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cos pi= -1
using the 360 circle ir those quadrants
i forgot what it was, link
 
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  • #2
afcwestwarrior said:
cos pi= -1
using the 360 circle ir those quadrants
i forgot what it was, link

First of all "pi" is NOT "90". Get that out of your head! Nor does "pi radians" correspond to "90 degrees" if that was what you meant. "pi radians" corresponds to "180 degrees", half a circle. The crucial thing you need to remember is that a full circle is 360 degrees, 2pi radians. Perhaps it would help to remember that a circle has circumference pi*d= 2pi *r. That's where the "2pi" comes from.
 

What does "Pi=90" mean?

Pi=90 is a mathematical equation that represents the relationship between the circumference and diameter of a circle. The value of pi is approximately 3.14159, and when multiplied by 90, it gives you the circumference of a circle with a diameter of 90 units.

How is pi related to circles?

Pi is a mathematical constant that is used to calculate the circumference, area, and other properties of circles. It is the ratio of a circle's circumference to its diameter and has a value of approximately 3.14159.

How do you find the value of pi?

The value of pi cannot be calculated exactly, as it is an irrational number with infinite digits. However, it is commonly approximated to 3.14159 or 22/7. It can also be calculated using various mathematical methods, such as the Monte Carlo method or infinite series.

Why is pi important in mathematics and science?

Pi is a fundamental constant in mathematics and science, and it appears in various equations and formulas. It is used to solve problems related to circles, spheres, and other curved shapes. It is also used in fields such as physics, engineering, and astronomy.

How is pi used in real-life applications?

Pi is used in various real-life applications, such as architecture, engineering, and technology. It is used to calculate the circumference and area of circles, which is essential in designing buildings, bridges, and other structures. It is also used in computer graphics and GPS systems to create accurate representations of curved objects and calculate distances.

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