Sine and Cosine Values on the Unit Circle

Based on your unit circle sin(90^o)=

• 1/2

• 0

• -1

• 1

sin π/4

• √2∕2

• 1/2

• √3/2

• 0

cos 5π/6

• -1/2

• 1/2

• √3/2

• -√3/2

cos 4π/3

• -√3/2

• √3/2

• 1/2

• -1/2

The sine of any angle on the unit circle is the y-coordinate.

• True

• False

sin 7π/6

• 1/2

• -1/2

• √3/2

• -√3/2

cos 270^o

• 0

• 1

• -1

• und

sin(7π/4)

• 1/2

• -√2/2

• √2/2

• -1/2

What is the value of sine at 330

• 1/2

• -1/2

• √3 / 2

• -√3 / 2

What is the value of sine at 210?

• 1/2

• -1/2

• √3 / 2

• -√3 / 2