Trig Day 1 Quiz

What is the exact value of cos 150^o

• -1/2

• 1/2

• √3/2

• -√3/2

What is the exact value of sin 150°

• -1/2
• -√3/2
• 1/2
• √3/2

cos(π)=

• 0
• 1
• -1
• 1/2

Convert 4π/ 3 radians to degrees

• 120

• 240

• 210

• 270

Convert 100⁰ to radians

• 5π/9
• π/2
• 5π/8
• 5π/6

Which of the following shows  $150\degree$  in standard positon?

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Which of the following shows  $\frac{5\pi}{4}$  graphed in standard position?

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Which of the following shows  $-\frac{\pi}{4}$  graphed in standard position?

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What is the coordinate point at  $225\degree$  on the unit circle?

•  $\left(\frac{\sqrt{2}}{2},\frac{\sqrt{2}}{2}\right)$  

•  $\left(-\frac{\sqrt{2}}{2},\frac{\sqrt{2}}{2}\right)$  

•  $\left(-\frac{\sqrt{2}}{2},-\frac{\sqrt{2}}{2}\right)$  

•  $\left(\frac{\sqrt{2}}{2},-\frac{\sqrt{2}}{2}\right)$  

Find a coterminal angle to -90°.

• -450°

• 90°

• 180°

• -180°