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Convert 40° 20′ Into Radian Measure

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Answer: As known, 1° = 60′

40° 20′ = 40° + 20′

= 40° + (2060)°

= 40° + (13)°

=  (120+13)°

= (1213)°

Radian = (180°) × Degree = (180°) × (1213)°

= π(121540)°

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