Introduction to the unit circle understanding

The x value on the unit circle is defined by which function?

Tags

CCSS.HSF.TF.A.2

The y value on the unit circle is defined by which function?

Tags

CCSS.HSF.TF.A.2

If a trig function is x, then in which quadrants would this trig function be positive? (which quadrant is x positivie?)

• 1 & 2

• 2 & 3

• 3 & 4

• 4 & 1

Tags

CCSS.HSF.TF.A.2

If y is a trig function, in which quadrants is this function positive? (In which quadrants is y positive?)

• 1 & 2

• 2 & 3

• 3 & 4

• 4 & 1

Tags

CCSS.HSF.TF.A.2

• 1 & 2

• 1 & 4

• 1 & 3

• 2 & 4

Answer explanation

Because both x and y are positive in quadrant 1 when you divide two positive numbers the result is a positive number. Also, when you divide two negative numbers the result is positive.

Tags

CCSS.HSF.TF.A.2

Why do we want to think of trig functions instead of triangle trig when we start looking at the unit circle?

Tags

CCSS.HSF.TF.A.2

How much did the videos help you understand Trig functions?

• It didn't help at all

• It helped a little bit. I had to watch it several times and I don't think I understand

• It really helped but I still have a lot of questions about what we're doing.

• I've seen this before so the video wasn't helpful. I know what I'm doing

Tags

CCSS.HSF.TF.A.2