How do I find all all angles.. without a calculator? 10 points

I need help on how to solve this,
The question is; Find all angles θ, 0 ≤ θ ≤ 2pi
a. Tan θ = 4
b. Sin θ = 0.1
c. Cos θ = 1.1
d. Csc θ = 3

Can anyone please explain step by step on how to do these WITHOUT a calculator?

Thanks

It's not impossible but difficult, a little bit. You can draw a triangle with any arbitary value with defined ratio and can find the approx value by measuring the angle. mind the value of cos, it can't be greater than 1.