Find the values of the following trignometric ratios:
(a) `"cos"480^(@)`
(b) `sin 1125^(@)`
( c)` tan(-480^(@))`
( d) `"cosec"(-1200^(@))`

Explanation

To find the values of the given trigonometric ratios, we will simplify each angle using periodic properties and reference angles.

### Solution Steps:

**(a) Find \( \cos 480^\circ \)**

1. **Reduce the angle**: Since cosine has a period of \(360^\circ\), we can subtract \(360^\circ\) from \(480^\circ\):
\[
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