Know when to use Pythagoras or Trigonometry to solve problems

Maths

Would you use Pythagoras or Trigonometry to work out x?

Find 𝑥 in the triangle. Give your answer to one decimal places.

Which of these could you use to work out x?

A ship sales 15 km on a bearing of 060° from a point P. How far East of its original position is it? Give your answer to 2 decimal places.

A plane flies 100 km due east from point A to reach point B. It then flies 30 km due south to reach point C. What bearing is C from A?