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Trig Functions
Reference Angles
angles and measure
Unit Circle
Law of sines and cosines
100
opposite / hypotenuse.
What is sine?
100
The acute angle formed by the terminal side of an angle and the x-axis
What is a reference angle
100
The side of an angle from which measuring starts
What is the initial side
100
The sine of 135 degrees
What is sq. root of 2 divided by 2.
100
Use this law when all 3 sides are known.
What is L o C
200
Cos A = ratio of these two sides of a triangle.
What is adjacent divided by hypotenuse?
200
The reference angle of 135 degrees.
What is 45 degrees
200
The direction that a positive angle rotates.
What is counter-clockwise
200
the cosine of 330 degrees
What is sq root of 3 divided by 2
200
Use this to solve a triangle if give an angle the side opposite it and another side or angle.
What is Law of sines
300
The tangent of an angle.
What is the opposite side divided by the adjacent side?
300
The reference angle of 300 degrees
What is 60 degrees
300
An angle that has its inital side at zero degrees is said to be in this position.
What is standard position
300
Has a sine of negative sq root 3 divided by 2.
What are 240 degrees and 300 degrees
300
Use this law when given two side and the angle in between the 2 side.
What is L of C
400
the reciprocal of cosine.
What is secant?
400
The reference angle of 210 degrees
What is 30 degrees
400
To convert degrees to minutes do this
What is multiply by 60
400
x/y = 1
What is the tangent of 45 degrees and the tangent of 225 degrees
400
Hero's formula
What is k = sq root (s(s-a)(s-b)(s-c)) where s = 1/2(a+b+c) a,b,c are sides and K is area of the triangle.
500
adjacent side / opposite side
What is cotagent?
500
The reference angle of 45 degrees
What is 45 degrees
500
Two angles in standard position that have the same terminal side.
What are coterminal angles.
500
Red
What is Mr. Welte's favorite color