Find Exact Unit Value of Circle in Trig

sinθ is positive in

• the 1st and 2nd quadrants
• the 1st and 3rd quadrants
• the 1st and 4th quadrants
• the 2nd and 3rd quadrants

cosθ is positive in

• the 1st and 2nd quadrants
• the 1st and 3rd quadrants
• the 1st and 4th quadrants
• the 2nd and 3rd quadrants

tanθ is positive in

• the 1st and 2nd quadrants
• the 1st and 3rd quadrants
• the 1st and 4th quadrants
• the 2nd and 3rd quadrants

sin π =

• 0
• 1
• -1 
• undefined

cos π =

• 0
• 1
• -1 
• undefined

Based on the unit circle, what is the value of sin?

• y

• x

• x/y

• y/x

Based on the unit circle, what is the value of cos?

• y

• x

• x/y

• y/x

Based on the unit circle, what is the value of tan?

• y/r
• x/r
• r/y
• y/x

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Using the Unit Circle, find the exact value of this trig function.

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• The correct answer is not listed