42 degrees, 29 minutes, and 6 seconds.
Explanation:
1. Understand complementary angles add up to 90° 0' 0"
2. Subtract the quantities separately.
2.1. Take a minute and convert it to seconds, so you can subtract.

So now you have some angle with 6".
2.2. Then, take a degree, and convert it to minutes, and subtract the previously taken minute, once more, so you can subtract.

Now you have some angle with 29' 6".
2.3. Finally, subtract the degrees.

Your angle is 42°29'6".