Inverse tangent in grads
On the circle, the tangent of is where the line meets the upright line at , exactly 1. For grads, press 
, 
, 
, 
. Press , 
, 1, 
; the answer is 50. grads. To return to degrees, press , , , .
On the circle, the tangent of 45∘ is where the line meets the upright line at x=1, exactly 1. For grads, press , , , . Press , , 1, ; the answer is 50. grads. To return to degrees, press , , , .
▶ Watch this step in the video (17:49)