Question

Assume
cos(x) + 2 sin(x) =11/5
and
6 cos(x) + sin(x) =22/5
Find the exact (numeric) value of sec(x)

Answer 1

let u=cos(x) and v=sin(x) so we have:
u+2v=11/5
6u+v=22/5
solve for u and v

Answer 2

ok thank you!!

Answer 3

I guess it has not answer because one equation more is there.
u2+v2=1
So two variable with three equations.