Sine
Sine is this ratio in a right triangle.
What is the opposite/hypotenuse?
Cosine is this ratio in a right triangle.
What is the adjacent/hypotenuse?
Tangent is this ratio in a right triangle.
What is the opposite/adjacent?
These are the angles where sin-1(0).
What are 0 and 180 degrees?
This is the coordinate on the unit circle that gives us the sine value for any given angle.
What is the y-coordinate?
These are the quadrants where sine is positive.
What are Quadrants 1 and 2?
This is the cosine of (3pi)/2.
What is 0?
This is the tangent of 300 degrees?
What is -√3?
This is the value of sec(pi/2).
What is 1?
These are the coordinates at 90 degrees on the unit circle.
What are (0, 1)?
This is the sine of 240 degrees.
What is -1/2?
This is the cos(225).
What is -sqrt(2)/2?
This is the tangent of -pi/2.
What is undefined?
These are the angles where cos-1(1/2).
What are 60 and 300 degrees?
Negative angles are measured in this direction on the unit circle.
What is clockwise?
These are the angles where the sin-1(-sqrt(3)/2)
What are 240 and 300 degrees?
This is the reciprocal of cosine.
What is secant?
These are the angles where tan-1(1).
What are 45 and 225 degrees?
These are the angle(s) where sec-1(2).
What are 60 and 300 degrees?
This is the definition of 1 radian.
What is the central angle formed by an arc with length of the radius?
This is the reciprocal of sine.
What is cosecant?
These are the angles where cos-1(-sqrt(2)/2).
What are 135 and 225 degrees?
On the unit circle, tangent is defined by this ratio.
What are 90 and 270?
Given this point on the terminal side of an angle theta (4, -3). This is the tangent of theta.
What is -4/3?