Complementary angles URGENT

Question

find an angle that is complementary to another angle that measures 20°22'31"

Answer 1

Hi,

when two angels are complementary it means sum of them is 90 degrees.

complementary of 20°22'31" is 90 - 20°22'31"

How can I subtract ?

you know 90 degrees = 89 degrees + 60 minute = 89 degrees, 59 minutes, 60 seconds -

20 22 31

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69 37 29

answer: 69° 37^' 29^"

^{I hope it is useful,}

^Minoo