Find the value of
(i) `cos(-60^(@)) " "` (ii)`tan(210^(@))" "` (iii)` sin (300^(@))" "` (iv)`cos(120^(@))`

Explanation

To solve the given trigonometric functions, we will evaluate each one step by step.

### Step-by-Step Solution:

**(i) Find the value of `cos(-60°)`**

1. **Use the property of cosine**: The cosine function is even, which means that `cos(-θ) = cos(θ)`.
2. **Calculate**: Therefore, `cos(-60°) = cos(60°)`.
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