Sine and Cosine are used to find angles, sides and occasionally the area of a triangle using their rules( a/SinA = b/SineB = c/SineC) (a^2= b^2 + c^2 - 2bc cosA) which can be rearranged to find what you need for any triangle. Sine and cosine can also be used on right angled triangles with the hypotenuse (longest side) and the opposite (side opposite the angle) with Sine and adjecent and hypotenuse for Cosine, the angle you have or are finding must always come after cosine or sine, e.g. sin(180). hope it helps 
Sine and Cosine are used to find angles, sides and occasionally the area of a triangle using their rules( a/SinA = b/SineB = c/SineC) (a^2= b^2 + c^2 - 2bc cosA) which can be rearranged to find what you need for any triangle. Sine and cosine can also be used on right angled triangles with the hypotenuse (longest side) and the opposite (side opposite the angle) with Sine and adjecent and hypotenuse for Cosine, the angle you have or are finding must always come after cosine or sine, e.g. sin(180). hope it helps
