Unit Circle Flashcards
What are the signs in each quadrant
Q1: (+, +)
Q2: (-, +)
Q3: (-, -)
Q4: (+, -)
Which part of the unit circle do Arccos, arcsin, and arctan cover
Arccos: Top half
Arcsin: Right half inclusive
Arctan: Right half not inclusive
What are the coordinates of the points on the axes and their positive radian measures
Right: (1, 0) 0 and 2π
Top: (0, 1) π/2
Left: (-1, 0) π
Bottom: (0, -1) 3π/2
What intervals of degrees do you have to know?
30 and 45
Which order do cos and sin go in in ordered pairs
(cos, sin)
How to find tan
sin/cos
Most common pythagorean identity
sin^2 + cos^2 = 1
Denominator 6
(√3/2, 1/2)
Denominator 4
(√2/2, √2/2)
Denominator 3
(1/2, √3/2)
What are the coordinates of the points on the axes and their negative radian measures
Right: (1, 0) 0 and 2π
Top: (0, 1) -3π/2
Left: (-1, 0) -π
Bottom: (0, -1) -π/2
Trig functions odd/even
Sin: odd
Cos: even
Tan: odd
Q1 radian measures +pattern
1π/denom
π/3
π/4
π/6
Q2 radian measures +pattern
(Denom-1)π/denom
2π/3
3π/4
5π/6
Q3 radian measures +pattern
(Denom+1)π/denom
4π/3
5π/4
7π/6
