Q. 1 F

# Find the value of

Answer :

We write cos 12° 35’ = cos 12° 30’ + 5’.

The relevant part of the cosine table is given below. From the table, we have

cos 12° 30’ = 0.9763

Mean difference for 5’ = 0.0003

We know that mean difference is to be subtracted in the case of cosine.

cos 12° 35’ = 0.9763 - 0.0003 = 0.9760

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