Trigonometry Foundations

sec 3π/2

• 0
• undefined
• 1
• -1

tan 7π/4

• -1
• 1
• √2/2
• undefined

cot π/2

• undefined
• 0
• 1
• 1/2

sin 2π/3

• 1/2
• -1/2
• √3/2
• -√3/2

tan (-π)

• undefined
• 0
• 1
• -1

What is the exact coordinates of  3π/4 on the unit circle?

• (−√2∕2, √2∕2)
• (−√2∕2, −√2∕2)
• (−√3∕2, −√2∕2)
• (√2∕2, −√2∕2)

cos 150^o

• -1/2

• 1/2

• √3/2

• -√3/2

What is the radius of a unit circle?

• 1
• 2
• 1/2
• 0

What is the exact value of sin 150°

• -1/2
• -√3/2
• 1/2
• √3/2

For what angles are sine and cosine the same?

• 0^o
• 45^o and 135⁰
• 45^o and 225⁰
• 45^o and 315⁰