Find the value of sin70°13'.
(Refer the trigonometric table for the values)

0.9401

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0.9104

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0.9408

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0.941

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Solution

The correct option is D 0.941
We can write,
70°13' = 70° 12' + 1'
From the table we have, sin70°12' = 0.9409
Mean difference for, 1′ = 1

sin70°12' = 0.9409
+ 1′ = 1 (Mean difference to be added for sine)
____________________
sin70°13' = 0.9410

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