The answers are:
The explanation is shown below:
1. By definition, when you have a rigth triangle, you can find the sine, cosine and tangent as following:
3. To know the lenght of the hypotenuse you can apply the Pythagorean Theorem:
4. Therefore if AC=12, BC=5 and the right angle is at C, you can substitute values to find the sine, cosine and tangent of A and B:
