Question

Can someone help?

Answer 1

when is tangent positive

Answer 2

Huh?

Answer 3

alright so it says that Sin is positive correct. Sin coordinates with the y values of the unit circle so you know that it must be in Quadrants I and II

Answer 4

now the second thing says tangent is positive, can you look at your unit circle and see when tangent is positive?

Answer 5

Im not even sure. This is all new to me. lol

Answer 6

do you have a unit circle with you?

Answer 7

Nuhuh

Answer 8

but i can google one

Answer 9

http://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Unit_circle_angles_color.svg/300px-Unit_circle_angles_color.svg.png

Answer 10

there is your unit circle , where (x,y)=(cos(theta),sin(theta)) so say for pi/6, you can see that cosine = sqrt(3)/2 and sin = 1/2

Answer 11

now what is tangent in terms of x and y

Answer 12

I honestly have no clue, i dont understand. :/

Answer 13

all are positive in 1st quadrant so ans of 1st question will be 1.

Answer 14

value of cosx will be 3/5. I can explain also.