Question

How do I complete the following table?

Answer 1

We are doing unit circles.
I know that the first row is: 90 = (0, 1), 180 = (-1, 0), 270 = (0, -1), 360 = (1, 0)

Answer 2

Is the second row(sin(theta)): 0=0, 90=1, 180=0, 270=-1, 360=0

Answer 3

yes

Answer 4

tan (theta) is = sin (theta)-cos (theta), correct?

Answer 5

not - but /

Answer 6

yes

Answer 7

do cos first, then do tan

Answer 8

cos row is: 1, 0, -1, 0, 1

Answer 9

sin(2theta)=2sin theta cos theta
cos(2theta)=2cos^2 theta-1 or 1-2sin^2 theta

Answer 10

cos row : correct :)

Answer 11

Nice:), How do i calculate tan? I know the formula but how do i input in my calculator?

Answer 12

And, if you haven't learned those, nevermind. I always use those cause I'm an idiot.

Answer 13

press the number, then the tan button.

Answer 14

if your calculator is fancy, press the tan button first.

Answer 15

Hmmm.. tan = sin /cos, you don't need calculator though :(