Topic is for those who kept looking for information about the law of sines and cosines.

Sine law:

Where a, b, c are the sides of the triangle.

Cosine law:

Let's check this on some exercises:

1) Solve the triangle where

The best practice is to draw the triangle and mark our known angles and sides.

We know two sides and angle between them.

To find length of sideawe have to use the Cosine Law:

To countBangle we need to use the Cosine law:

To count angle C we have to use simple formulae. As we know sum of angles in triangle is equal to 180°.

Answer: Angles- and Sides-

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