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Q.

The measure of an angle in degrees, grades and radians be D,G and C respectively then the relation between them

D90=G100=2Cπbut1c=180π°=57°.17'44.8"then the value of cos1cis

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a

<12

b

12

c

>12

d

0

answer is C.

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Detailed Solution

1c=57°,17',44.8"<60°cos1c>cos60°=12Hence  cos1c>12   cos is decreasing in 0,π2

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The measure of an angle in degrees, grades and radians be D,G and C respectively then the relation between themD90=G100=2Cπ but 1c=180π°=57°.17'44.8"then the value of cos1cis