Question

I have a few of these to do and would like an explanation to one of them so i can do the rest.... pic attached

Answer 1

If cosx= 1 then x=0 so sinx=0 tanx = sinx/cosx = 0/1 = 0 , secx = 1/cosx = 1/1 = 1 , cosecx = 1/sinx = 1/0 = undefined (asymptote) , cotx= 1/tanx = 1/0 = undefined (asymptote). when x= 0 it will be 0 in terms of degrees or radians , but for other questions to convert from degrees to radians divide by 180 and times by pi. To go from radians to degrees divide by pi and times by 180.

Answer 2

how do i go from radians to degrees or vice versa if i dont have neither

Answer 3

you need to know the graph of cosx or sinx , or at least know the main values of cosx or sinx, that will tell you what the angle must be ....for example cos(45) = 1/root 2 or cos (30)= root3/2 , cos60= 1/2 , sin 30 = 1/2, sin45 = 1/root2 (or root2/2) and sin60= root3/2, other main values sin90 = 1 and cos90 = 0

Answer 4

ok, can u give me the conversions things.... like u gave tanx=sinx/cosx.... secx=..... cscx=.... cotx=....singx=.... etc

Answer 5

i also do not know that main values