4.1-4.3 Radians, Right Triangles and the Unit Circle

Convert 510^o to Radians

• 25π / 3

• 23π / 8

• 17π / 6

• 51π / 8

Convert -520^o into Radians

• -17π / 4

• -21π / 6

• -26π / 9

• -23π / 6

Find the arc length of the bolded arc. Give your answer in terms of π.

• (65/12)π cm

• 17.02 cm

• (845/24)π cm

• 26π cm

What is  $\frac{11\pi}{6}$   radians in degrees? 

• 30

• 330

• 360

•  300

 $\frac{8\pi}{3}$  is equivalent to what degree measure?

•  $480\degree$  

•  $240\degree$  

•  $800\degree$  

•  $24\degree$  

 Convert   $\frac{\pi}{4}$  to degrees

• 90⁰

• 45⁰

• 60⁰

• 30⁰

What are the negative and positive coterminal angles of 240 degrees?

• 540°, -120°
• 600°, -120°
• 425°, -240°
• 120°, -135°

What are the negative and positive coterminal angles of -225 degrees?

• 375°, -600°
• 125°, -356°
• 135°, -585°
• 60°, -120°

What is the cosine of angle P?

• p/q
• q/r
• p/r
• r/q

Set up the problem...

• sin X = 41/28
• tan X = 41/28
• cos X = 28/41
• sin X = 28/41