You can calculate this on any scientific calculator. Those calculators don't usually have a special key for the cotangens, but this is the same as 1 / tan(68).
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.105
the cotangent of a 50 degree angle is -3.678 This is in Radians. The cotangent of a 50 degree angle is .8391 (rounded) degrees.
Acute angle
cot 32° = 1/(tan 32°) = 1/(0.6249) = 1.6003
a 30-degree angle .
cot(69) = 0.3839, approx.
cot(32 deg) = 1.6003, approx.
90 - 68 ie 22 degrees
The third angle is 68 degrees which makes it a scalene triangle
90-22-68