The Circle of Units
Sharp Angles
What's the equation?
Looking into the mirror
100

90 Degrees in Radians 

What is pi/2? 

100

The length of the hypotenuse on the unit circle 

1

100

The height from the center line to the peak is called


Amplitude



100

cos-1(sqrt(3)/2) equals ?

What is pi/6 radians 

200

30 degrees is a reference angle for 

A. -30 and 120 

B. 150 and 330

C. 60 and 330 

D. 60 and 150 

What is B 

200

 Tan A = 2/3, then sin A = what? 

what is 2/sqrt(3)

200

In the equation Sin(x)+2 the amplitude is?  

200

evaluate tan-1(1) 

what is pi/4 radians 

300

The exact value of sin(3pi/4) 

What is sqrt(2)/2

300

 sin (A – B) = 1/2, cos (A + B) = 1/2, and 0° < A + B ≤ 90°, A > B, then A =


what is 30 Degree

300

The general form of a cos function 

Acos(bx-c)+d

300

What is the derivative of y = arccos(cos x)?


Sin(x)

400

the exact value of sin(315) 

What is -sqrt(2)/2

400

A right triangle has a= 5.11 and b = 8.7 so Value A must equal ?

What is 34.6 

400

A graph with a local maximum of 3,7 means this for the equation of the graph's amplitude 

Its = to 7 

400

evaluate sin-1(sin(pi/4))

What is pi/4 radians 

500

The sum of 3tan(5pi/6) and cot(3pi/4)

What is -sqrt(3)-1

500
a right triangle has angle a = 5, b = 12, c = 13

The equation that shows to correct relation 

cos A 5/13

sin A 5/13

cos A 13/12

sin A 12/13

What is sin A 5/13

500

y= -cos(2x+pi/2) would have a period of what 

pi

500

evaluate tan-1(tan-1(-4))

What is -4