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  1. The complement of 30°20′ is:
    1. 69°40′
    2. 59°40′
    3. 35°80′
    4. 159°40′
    5. None of these
Correct Option: B

complement of 30°20′ = 90° – ( 30°20′ ) = 90° – ( 30° + 20′ )
= (89° – 30°) + (1° – 20′)
= 59° + 60′ – 20′ [ ∴ 1° = 60°′]
= 59° + 40′ = 59°40′.


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