Area of a Triangle - Trigonometry?
1/2absinC
Cosine Rule to find a side?
a^2 = b^2 + c^2 - 2bc x cosA
Sine Rule to find a side?
a/sinA = b/sinB = c/sinC
Sine Rule to find an angle?
sinA/a = sinB/b = sinC/c
Cosine Rule to find an angle?
Cos A = b^2 + c^2 - a^2/2bc