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What is the reference angle for the angle with measure −π/4

π

−7π/4

π/4

7π/4

Lexi0402  Jan 1, 2018
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1) What is  -pi/4 in degrees?  What quadrant is it in?

2) The reference angle is the one from the poisitve, or negative x axix. 

    Willl you use the positve x axis OR the negative x axis for this quadrant?

3) What reference (acute) angle will give the same trig ratios?

 

Think about my questions, if you get stuck let me know where  :)

 

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Here are a couple of general videos that might help with this topic.

 

https://www.youtube.com/watch?v=gBdkYEbaawA

 

https://www.youtube.com/watch?v=Ejzv3qxcZVk

Melody  Jan 1, 2018

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