Geometrical: Depiction of trigonometric graphs

f=2 sin x
I think g= cos x
and
h= -tan x
G's period is 360 degrees

You should be able to do 6.3

I'm not even sure what 6.4 is trying to say.

Yeah. No clue about 6.4 I was hping you guys would know. Wierd question. Ta for help though.

g's period looks like 180 degrees to me.

6.4: The notation looks odd (comma and semicolon?). It looks to me like it's saying that f and g intersect at A and B. If the x-coordinate of A is 11.95, what is the the y-coordinate (k)? What are the x- and y-coordinates of B?

you're right about g's period, it is 180

6.4)
k=2/sqrt(5)

(Take squares of both sides of 2sin(x)=cos(x) and use sin(x)sin(x)+cos(x)cos(x)=1.)