Question

Using trigonometric tables, find the approximate value of cot 73°.

Answer 1

Given: cot 73°

Step-wise calculation:

1. Use the identity cot θ = tan (90° – θ).

So, cot 73° = tan (90° – 73°)

= tan 17°

2. Look up tan 17° from trigonometric tables or use sin/cos from the tables and divide.

From the tables tan 17° ≈ 0.3057.

cot 73° ≈ 0.3057.