Question

Using trigonometric tables, find the approximate value of sin 13° 39'.

Answer 1

Given: Angle = 13° 39'

Convert minutes to decimal:

`39' = 39/60`

= 0.65°

So, angle = 13.65°. 

Look up or interpolate this entry in the trigonometric tables; the table gives sin 13° 39' ≈ 0.2359.