functions
practice problems
unit circle
Trig functions
Converting
100

what is the function of sine?

Opposite over hypotenuse 

100

Give radians and ordered pair for 90º

π/2 (0,1)

100

What does the unit circle help us do?

find the values of trigonometric functions.

100

What is the Sine rule?


Sine rule: a/sin(A)=b/sin(B)=c/sin(C)

100

How do you convert degrees to radians? 

multiply by PI over 180 degrees 

200

What is the function of cosine?

Adjacent over hypotenuse 

200

Give radians and ordered pair for 150º

5π/6 (-√3/2, 1/2)

200

What is meant by “wrapping the number line around the unit circle?” 

maps the length of the arc that starts at (1,0)

200

What is the cosine rule?


Cosine rule: a2=b2+c2−2bccos(A)

200

...

Freeby!!

300

What is the function of tangent? 

opposite over adjacent 

300

What quadrant has all positive signs?

The first

300

How far does trigonometry and the unit circle date back?

Egyptian times 

300

What is the area of a triangle?


Area of a triangle: Area=1/2 absin(C)

300

How do you convert radians to degrees 

multiply 180 degrees by PI 

400

What is the function of the unit circle?

 x2+y2=1.

400

Find the value of tan(45º) using the unit circle. 


400

.....

Freeby!!

400


 

The area of the triangle is 16cm2. Find the length of the side x.

5.0 cm

400

What is the formula of radians? 

one radian is = 180/PI degrees 

500

What are the (X,Y) coordinates?

x=cos

y=sin

500

What are the signs of an ordered pair in QI

both x and y are positive 

500

Hoe many quadrants and angles does the unit circle consist of?

four quadrants and 16 angles 

500

....

Freeby

500

What is the difference between radians and degrees?

A degree is a unit of measurement which is used to measure circles, spheres, and angles while a radian is a unit of measurement which is used to measure angles.