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  1. The degree measure of 1 radian (taking π = (22 / 7)) is
    1. 57°61’22” (approx.)
    2. 57°16’22” (approx.)
    3. 57°22’16” (approx.)
    4. 57°32’16” (approx.)
Correct Option: B

Using Rule 1,
π = radian = 180°

∴ 1 radian =
180°
π

=
180 × 7°
22

=
630
= 57
3
°
1111

= 57°
3
× 60" = 57°
180'
1111

= 57°16'
4
× 60" = 57°16'22"
11



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