1
Question
Find the value of sin20°15'.
(Refer the trigonometric table for the values)
Find the value of sin20°15'.
(Refer the trigonometric table for the values)
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Solution
The correct option is C 0.3461
We can write,
20°15' = 20° 12' + 3'
From the table we have, sin20°12' = 0.3453
Mean difference for 3′ = 8
sin20°12' = 0.3453
3′ = + 8 (Mean difference to be added for sine)
____________________
sin20°15' = 0.3461
We can write,
20°15' = 20° 12' + 3'
From the table we have, sin20°12' = 0.3453
Mean difference for 3′ = 8
sin20°12' = 0.3453
3′ = + 8 (Mean difference to be added for sine)
____________________
sin20°15' = 0.3461
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