if tan x=5/3
a) What is the value of sin (2x)
b) What is the value of cos (2x)
my awnser have to be in fraction
Im not allowed to use a calculater to get an awnser and im unsure what im suppose to do...
I think that sin x=5
and cos x=3
but i really don't know...
Thanks in advance
Janne the Swede