Exact Values of Trig Functions
Cosine and Sine Law
Unit Circle
Tri functions of theta
Reference Angles
100

What is the exact value of Cos 60°

1/2 

100

What is the sum of all angles in a triangle? 

180

100
What two quadrants can contain an angles that has a sin of 1/2?
I and II
100
What is the tan of an angle that contains an endpoint of (3,4)?
4/3
100

What is the reference angles for 130 degrees?

50°

200

What is the exact value of tan 225°?

1

200

If you know an opposite pair (side and angle opposite from each other) which law do you use? 

Sine Law

200
What two quadrants can contain an angles that has a cos of 1/2?
I and IV
200
What is the tan of an angle that contains an endpoint of (5,-3)?
-3/5
200

What is the reference angle for 222?

42°

300
What is the exact value of: cos -270 degrees?
0
300

What law do you use if there is a known angle adjacent to two known sides? 

Cosine Law

300

What is the exact measure of sinΘ = 0 where 0°≤ Θ≤360°?

0°, 180°, 360°

300

What is the sin of an angle that contains an endpoint of (-8,15)?

15/17

300

What is the Reference angle for 271 degrees?

89°

400

If cos A=(√3)/2 and not in quadrant I what is the exact value of tan A? 

-(√3)/3

400

In △ABC angle A= 49°, angle B= 57° and a = 8cm, what is b (to the tenth)?

8.9cm

400

On the unit circle, what are the coordinates of 30° (x,y)?

(√3/2, 1/2)

400

What is the cos of an angle that contains an endpoint of (-3,-4)?

-3/5

400

What is the Reference angle for -103 Degrees?

77 °

500

What is the exact value of cos in quadrant II with a reference angle of 30°?

-(√3)/2

500

With △DEF, complete the following equation: Cos E = ?

Cos E = (d2+f2-e2)/2df

500

What quadrant contains an angle of cos -1/√2 where tan>0?

III

500

What are the three trig ratios at the point (5, -12)?

Tan = -12/5 , Sin = -12/13, Cos =5/13

500

What is the Reference angle for the point (-√2 , -√6)?

60°

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