Question

Using trigonometric tables, find the approximate value of cot 47° 13'.

Answer 1

Given: Find cot 47° 13'.

Step-wise calculation:

1. cot θ = tan (90° – θ)

So, cot 47° 13' = tan 42° 47'.

2. Looking up tan 42° 47' in the trigonometric tables, interpolation gives tan 42° 47' ≈ 0.9255.

3. Hence, cot 47° 13' = 0.9255 rounded.