trigonometry
posted by Anon on .
an example problem showed the following
log tan A/2 = 9.54435  10
A= 38 deg 36' 12"
Now i want to do the same.
log tan A/2 = 9.85551  10
A= ??
I don't know how to convert tan into degrees can you help me.

log tan A/2 = 9.85551  10
log tan A/2 =  0.14449
take inverse log
tan A/2 = 0.716984884
take inverse tangent
A/2 = 35.64
A = 71.28°
= 71° 16' 48"