This week in advanced math we learned how to do law of cosigns. It was kinda difficult but not really. Next week we have exams so we will be doing alot of reviewing.

LAW OF COSINES:
the formula: (opposite leg)^2=(adjacent leg)^2+(adjacent leg)^2-2(adjacent leg)(adjacent leg)cosine(angle between)


Lets say two sides of a triangle have lengths of 6cm and 12cm and the angle between is 60 degrees. What is the third side?
1)first you must draw your triangle and label it!
2) since we already know our 2 angles and the angle between, we can plug it into the formula.
x^2=6^2+12^2-2(6)(12)cos60 degrees.
3) everything is squared so when you plug it all into your calculator you must square root all of it.
4) your answer is 10.392