Sine and Cosine Unit Circle

What is the value of sine at 210?

• 1/2

• -1/2

• √3 / 2

• -√3 / 2

What is the value of cosine at 270

• 0

• 1

• -1

At what point are sine and cosine the same value?

• 0

• 90

• 45

• 60

What is the value of sine at 330

• 1/2

• -1/2

• √3 / 2

• -√3 / 2

What is the value of cosine at 315

• 0

• 1

• √2 / 2

• -√2 /2

What is the value of sine at 150

• 0

• 1/2

• 1

• √3 / 2

cosθ is positive in

• the 1st and 2nd quadrants

• the 1st and 3rd quadrants

• the 1st and 4th quadrants

• the 2nd and 3rd quadrants

Based on your unit circle cos(0^o)=

• 1

• 0

• -1

• 1/2

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

• 1/2

• 0

• -1

• 1

cos 5π/6

• -1/2

• 1/2

• √3/2

• -√3/2