The Unit Circle
The sine of 90°
1
cos (π/2 - x) equates to ..?
sin x
sin2x + cos2x equates to ..?
1
The inverse of sine and its reciprocal is located in which two quadrants?
Quadrants 1 and 4
The cosine of 225°
-(√2)/2
cot x equates to ..?
(cos x)/(sin x)
tan2x + 1 equates to ..?
sec2x
The inverse of cotangent lives in which two quadrants.?
Quadrants 1 and 2
The secant of 60°
2
sec (-x) equates to ..?
sec x
cos(a+b) equates to ..?
cos(a)cos(b) - sin(a)sin(b)
csc-1(2) equates to ..?
30°
The acronym that Mrs. Byrd taught us to remember the Unit Circle
All Students Take Calculus
sin x + sin 2x equates to ..?
x = 0, 2π/3, π, 4π/3
sin(2x) equates to ..?
2sin(x)cos(x)
cos-1(1/2) equates to ..?
60°
Only the Tangent and its reciprocal are positive in this quadrant
Quadrant 3
(sin x)/(1-cos x) + (sin x)/(1+cos x) equates to ..?
2 csc x
tan(x/2) equates to ..?
±√[1 - cos x] / [1 + cos x]
cot-1(1) equates to?
45°