trigonometric Functions (again...)

Hi,

I'm trying to solve these two problems.

1. Use the given function values and trigonometric indentites to find the indicated trigonometric functions.

sec = 5, tan = 2*sqrt(6)

a) cos θ. I have found that it is 1/5 though I'm not sure.

b) cot θ. I have sqrt(6)/12

c) cot(90 - θ). I don't know how to solve this one

d) sin θ. This one neither.

2. Find the values of θ in degrees and radians.

a) cot θ = sqrt(3)/3

b) sec θ = sqrt(2). I have for this one 45 degrees and pi/4

I'll be really REALLY grateful if somebody can help. Anyways you guys always do so thanks a million!! :)

Isabel