Pi | CourseNotes

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algebra 2

the unit circle every 30 degree mark is just a faction counted by 1/6 in radians every 45 degree mark is just a fraction counted by 1/4 in radians the drgrees start at one then add 30, add 15, add 15, add 30, add 15, add 15, and so on the negatives are equivalent to the positives except opposite of them

How to add fractions easilly

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Mathematics

Elementary arithmetic

Numbers

Pi

My Pre-Cal teacher taught us this. When you are trying to add fractions during a sine or cosine problem, or something that has to do with a unit circle or a triangle, use this: Ex: 1/4 + 3/5 Multiply 5*1, multiply 4*3 and add them for the numberator, and multiply 4*5 for the denominator. So it would be 5+12/20. 17/20. You multiply the denominator of one and numerator of other by the denominator of other and numerator of one.Then add. That will give you the numerator. Then the denomnator you multiply both denominators and add.

Basic Trigonometric Formulas

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Calculus

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trig

Basic

PreCalculus Review

Trigonometric

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Formula

Trigonometric Formulas Pythagorean Identities Sum and Difference Formulas Double Angle Formulas Squared Formulas Half-Angle Formulas Product-to-Sum Formulas Sum-to-Product Formulas
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Trigonometry Reference Chart

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Mathematics

Generalized trigonometry

Unit circle

Trigonometric functions

Degree

Angle

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Trigonometry sin cos circle Trig

Circle

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The unit circle is a commonly used tool in trigonometry because it helps the user to remember the special angles and their trigonometric functions. The unit circle is a circle drawn with its center at the origin of a graph(0,0), and with a radius of 1. All angles are measured starting from the x-axis in quadrant one and may go around the unit circle any number of degrees. Points on the outside of the circle that are in line with the terminal (ending) sides of the angles are very useful to know, as they give the trigonometric function of the angle through their coordinants. The format is (cos, sin). Note that in trigonometry, an angle can be of any size, positive or negative. An angle larger than 360º means that you have gone round the circle more than once.

Special Factors

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Algebra

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Pi

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x^2-a^2=(x-a)(x+a) x^3-a^3=(x-a)(x^2+ax+a^2) x^3+a^3=(x+a)(x^2-ax+a^2) x^4-a^4=(x-a)(x+a)(x^2+a^2) x^4+a^4=[x^2+(sqrt2)ax+a^2][x^2-(sqrt2)ax+a^2] x^n-a^n=(x-a)[x^(n-1)+ax^(n-2)+...+a^(n-1)], for n odd x^n+a^n=(x+a)[x^(n-1)-ax^(n-2)+...+a^(n-1)], for n odd x^2n-a^2n=(x^n-a^n)(x^n+a^n)

Unit circle

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Circles

Conic sections

Curves

Spheres

Unit circle

Generalized trigonometry

Pi

N-sphere

In mathematics, a unit circle is a circle with a radius of one. Frequently, especially in trigonometry, "the" unit circle is the circle of radius one centered at the origin (0, 0) in the Cartesian coordinate system in the Euclidean plane.

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Unit circle

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Circles

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Unit circle

Generalized trigonometry

Pi

N-sphere

n mathematics, a unit circle is a circle with a radius of one. Frequently, especially in trigonometry, "the" unit circle is the circle of radius one centered at the origin (0, 0) in the Cartesian coordinate system in the Euclidean plane.

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mnemonic devices for geometry!

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