1
Question
Find the value of cos19°59'.
(Refer the trigonometric table for the values)
Find the value of cos19°59'.
(Refer the trigonometric table for the values)
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Solution
The correct option is B 0.9398
We can write,
19°59' = 19°54' + 5'
From the table we have, cos19°54' = 0.9403
Mean difference for, 5′ = 5
cos19°54' = 0.9403
- 5′ = 5 (Mean difference to be subtracted for cosine)
____________________
cos19°59' = 0.9398
We can write,19°59' = 19°54' + 5'
From the table we have, cos19°54' = 0.9403
Mean difference for, 5′ = 5
cos19°54' = 0.9403
- 5′ = 5 (Mean difference to be subtracted for cosine)
____________________
cos19°59' = 0.9398
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