Use the ratios

In right-angled triangle ABC, ∠C = 90°. Find the value:

1. sin A if opposite = 3, hypotenuse = 5
2. cos A if adjacent = 12, hypotenuse = 13
3. tan A if opposite = 8, adjacent = 6
4. Write sin 60° as an exact surd
5. Write tan 45°

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