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4.1 - 4.4 Vocabulary: Right Triangle Trigonometry

                                    Name: ___________________
                                    Period: __________________
                                    Date: ____________________
Across
Functions that behave in a repetitive, cyclic manner are called ________.
The trig function equal to 1/x.
The smallest number c for which f is periodic is called the ______ of f.
One ______ is the measure of a central angle that intercepts an arc s equal in length to the radius r of the circle.
An angle of _________ represents the angle from the horizontal downward to an object
The trig function equal to 1/y.
A(n) _______ of a circle is the region bounded by two radii of the circle and their intercepted arc.
Cofunctions of _____________ angles are always equal.
Two positive angles are _____________ when their sum is pi
Angles between pi/2 and pi
The trig function equal to y/x.
Angles that have the same initial and terminal sides
The ____ circle is a circle centered at the origin with a radius of one unit.
An angle of _________ represents the angle from the horizontal upward to an object
You determine the _______ of an angle by the amount of rotation from the initial side to the terminal side.
______ speed = arc length divided by time
An angle in which the origin is the vertex and the initial side coincides with the positive x-axis is said to be in _________ position.
A second way to measure angles, aside from radians, is in _______
A function is ____ when f(-t) = f(t)
Down
The acute angle formed by the terminal side of an angle and the horizontal axis
Because r = (x^2 + y^2)^1/2 cannot be zero, it follows that the sine and cosine functions are _______ for any real value of the angle.
Clockwise rotation generates _________ angles.
The longest side of a right triangle
The trig function equal to x/y.
The side across from the angle in a right triangle
Derived from Greek language, this word means "measurement of triangles."
The position after rotation is the _________ side.
The side next to the angle in a right triangle
Two positive angles are ______________ when their sum is pi/2
________ speed = central angle divided by time
Counterclockwise rotation generates _________ angles
A function is ___ when f(-t) = -f(t).
The trig function equal to y.
The starting position of the ray is the _______ side of the angle.
Angles between 0 and pi/2
To define a radian, you can use a ________ angle of a circle, one whose vertex is the center of the circle.
The trig function equal to x.
A(n) is determined by rotating a ray (half-line) about its endpoint.
The endpoint of the ray is the ______ of the angle.