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Standard form
Positive slope: Line rises from left to right Negative slope: Line falls from left to right Zero slope: Horizontal line Undefined slope: Vertical line
The slope describes the steepness and direction of a line
Gives the coordinates of the midpoint between two points
Special case: If h = 0, k = 0, this is the equation
Center: (h,k) Radius: r
Important in geometric problems, finding the length of a line segment
Used to find the distance between two points in the coordinate plane
Slope-Point Form
Use this form when you know a point and the slope
Slope-Intercept Form
m = Slope b = y-intercept
A polynomial with degree 1 is called a linear polynomial, degree 2 is quadratic, degree 3 is cubic, and so on.
The degree is the highest exponent of the variable in the polynomial.
In trigonometry, the Cosine Rule says that the square of the length of any side of a given triangle is equal to the sum of the squares of the length of the other sides minus twice the product of the other two sides multiplied by the cosine of angle included between them.
In any plane triangle, the ratio of the sides is equal to the ratio of the sines of the angles opposite to those sides.
Relates the sides of a right-angled triangle.
Formula
Basic Trigonometric Ratios:
Tangent: tan 𝜃
Opposite ------------ Adjacent
Cosine: cos 𝜃
Adjacent --------------- Hypotenuse
Sine: sin 𝜃
Opposite -------------- Hypotenuse