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example Calculate the angle of (a) 10(c) 1" (second of arc or arc sec) in radian.NCERT Solved Example(degree) (b) 1' (minute of arc or arc min) andUse 360°-2 π rad., 1°-60' and 1'-60".

Answer»

Thus 2 radians equals360 degrees. This means that 1 radian = 180/ degrees, and1 degree= /180 radians.

d(A,B) = R a /180, These formulas can be checked by noticing that the arc length is proportional to the angle, and then checking the formula for the full circle,



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