Hello! I ran onto these twos problem on one of my assignments. We're only a few weeks into this semester and I'm not sure how to solve these without a calculator.. Could someone please help me start to solve it or solve them for me(step-by-step)? Thank you so much!

"Without using a calculator, choose the point on the terminal side of theta.

1). theta = 5pi/4"

and

"Evaluate without using a calculator.

2). sin theta, if cos theta=2/5 and tan theta<0"

Thank you very much!