Law of Sin

If we have triangle with each angle called A, B and C and the line between them are called a, b and c view image

then

`sinA/a=sinB/b=sinC/c` this can be applied into a triangle

so if we have lets say angle B, side b and angle A then can use `sinA/a=sinB/b` to find a.

Cosine Law

By looking at the image:

`a^2=b^2+c^2+(2bc)cosA`

`b^2=a^2+c^2+2(ac)cosB`

`c^2=a^2+b^2+(2ab)cosC`