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cosine sine tangent cosecant secant cotangent
the ratios of a right triangles 3 sides

solving a right triangle
find all sides and all angle measures

angle of elevation
the angle an object moving upward makes

angle of depression
the angle an object moving downward creates

initial side
the starting point for an angle

terminal side
the end line of an angle

standard position
an angle in which both sides are positive is in standard position

coterminal
two angles in standard position are coterminal

sector
a region of a circle bound by two radii

center angle
angle formed by two radii

quadrantal angle
the terminal side of the angle lands on an axis

reference angle
always acute, always positive, formed by the terminal side.




law of sines
how to solve for a triangle that gives you 2 angles and any side, two sides and an angle opposite, three sides, two sides and an included angle.

law of cosines
how to solve for a triangle which gives two sides and an angle

parametric equations
a pair of equations that expressed x and y in terms of a third variable, t.

parameter
t in a parametric equation is the parameter

