can someone verify what the complement of angle of 20 deg is. and the supplement of an angle of 3pie / 5
Nothing to verify because you did not say what they are.
You want to know them?
Complement angle of 20 deg is 70 deg. ---answer.
Complementary angles are 90 degrees.
Supplement angle of 3pi/5 is
2pi -3pi/5 = (10pi -3pi)/5 = 7pi/5 ---answer.
Supplementary angles are 2pi radians.