ELT 1, 2 & 3 Review

Identities

100

sin

y

200

cos

x

300

tan

y/x

400

sec

1/x

500

csc

1/y

Radians

100

360 deg

2 pi

200

30 deg

pi / 6

300

60 deg

pi / 3

400

45 deg

pi / 4

500

765 deg

17 pi / 4

Degrees

100

pi

180

200

2 pi / 3

120

300

5 pi / 6

150

400

5 pi / 4

225

500

23 pi / 6

1230

Unit Circle

100

sin(pi/4)

sqrt(2)/2

200

cos(pi/3)

1/2

300

sin(pi/3)

sqrt(3)/2

400

tan(pi/4)

1

500

tan(pi/2)

DNE

Trivia

100

The sum of the interior angles in a triangle expressed in radians.

pi

200

The two fundamental identities from which all other trig identities can be expressed.

sin and cos

300

csc and sec will never be between these two numbers.

-1 and 1

400

The equation in terms of x and y for the unit circle.

x^2+y^2=1

500

The geometry of shapes on a flat plane or surface with zero curvature.

Euclidean Geometry