Find the missing side

Find x to 3 s.f. Diagrams are right-angled.

1. Angle 40°, adjacent = 15 cm, opposite = x
2. Angle 25°, hypotenuse = 20 cm, opposite = x
3. Angle 55°, opposite = 8 cm, hypotenuse = x
4. Angle 70°, adjacent = x, hypotenuse = 9 cm

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