Identities
Unit Circle
Inverse Unit Circle
Radians to Degrees
100

sin2x + cos2x = ?

1

100

sin(30) = ?

1/2

100

sin-1(-1/2) = ?

30 degrees

100

pi/2

90 degrees

200

sin(2x) = ?

2(sinx)(cosx)

200

cos(60) = ?

1/2

200

cos-1(1/2) = ?

60 degrees

200

pi/4

45 degrees

300

cos(2x) = ?

cos2x - sin2x

300

tan(90) = ?

0

300

sin-1(1)

90 degrees

300

pi/3

60 degrees

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