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The Question & Answer (Q&A) Knowledge Managenet

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Table of Contents

- What is the scientific notation outline?
- How do you write 0.00125 in scientific notation?
- What does GRD mean on a calculator?
- What does 1 degree and radian mean?
- Do you use radians or degrees in physics?
- What is the difference between degrees and radians?
- Why is PI 180 degrees?
- Is Pi equal to 180 degrees?
- Is Pi equal to 90 degrees?
- Is Tau better than pi?
- What is the symbol for 2 pi?
- Why is Pi 4 so bad?
- What is half PI called?

Scientific notation is a way of writing very large or very small numbers that uses exponents. Numbers are written in the format a × 10b. Changing numbers to or from scientific notation is easy to do by following three simple steps.

- 0.00125 = 1.25 x 10 -3
- 2,000,000,000 = 2 x 109
- 796 000 =7.96 x 105
- 872 = 8.72 x 102
- 90 = 9 x 101
- 27 x 103 =2.7 x 10 4
- 281 x 10 2 = 2 .81 x 10 4
- 0.00179 = 1.79 x 10 -3

RAD Deg option allows you to enter the angles of some trigonometric functions …. without giving the radian symbol…. system automatically takes the angle to be in radians. E.g if you enable the RAD mode and type , the calculator will assume to be radians and return 0 as answer. ()

Degrees and radians are ways of measuring angles. A radian is equal to the amount an angle would have to be open to capture an arc of the circle’s circumference of equal length to the circle’s radius. 360° (360 degrees) is equal to 2π radians.

2 Answers. If there is a degree symbol, ∘, then use degree mode. If there is no degree symbol, then use radian mode. Even if there is no π in the number.

Degrees measure angles by how far we tilted our heads. Radians measure angles by distance traveled. or angle in radians (theta) is arc length (s) divided by radius (r). A circle has 360 degrees or 2pi radians — going all the way around is 2 * pi * r / r.

Well if an entire circle is 2π⋅r half will be only π⋅r but half a circle corresponds to 180° ok… Perfect…. Your arc length, for half circle, we saw that was π⋅r dividing by r …you get π radians!!!!!!

So now that we say that there are 2pi radians in a circle, we can say that half of that, pi, is equal to half of a circle, also known as a straight line, so pi radians is equal to 180 degrees, and likewise, 90 degrees is equal to pi/2 radians. “pi radians” is 3.14 “radiuses”, hence the term.

A radian is a unit of measurement for angles defined by the ratio of the length of the arc of a circle to the radius of that circle. 180 degrees = PI radians, 360 degrees = 2*PI radians, 90 degrees = PI/2 radians, etc.

The crux of the argument is that pi is a ratio comparing a circle’s circumference with its diameter, which is not a quantity mathematicians generally care about. Tau is precisely the number that connects a circumference to that quantity. But usage of pi extends far beyond the geometry of circles.

Tau

Ceiling(x) is least integer greater than or equal to “x”. Therefore, you’re getting pi=4 cause you are approximating ceiling function to equal function. This theory is wrong. it assumes that the hypotenuse side of a right angled triangle is equal to the sum of other two sides (the opposite and adjacent).