line tangent from...

[Castle1]

whats a simple way to draw a line tangent from a circle at a constrained angle, and typing in the distance? I've tried @2.5<118, <118, they don't work. It's wanting me to nail down an end point, all I know is it's 28 deg off 90 tangent from an arc. and intersects at a line (no way of knowing that point until this line is drawn)
Thanks for any help on this,

[ger21]

Draw a line from the center of the circle at the desired angle, offset the circles radius, and extend to the line.