alleryConvert 40°20′ to radian measure.
A121π/270 radian
B40π/100 radian
C40π/180 radian
D121π/540 radian
Answer & Solution
Correct answer: D. 121π/540 radian
40°20′ = 40 + 20/60 = 40 + 1/3 = 121/3 degrees.
Multiply by π/180: (121/3) × (π/180) = 121π/540 radians.
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