Math
If A+B+C=pi then prove that cos3A. cos3B+cos3B. cos3C+cos3C. cos3A=1

choice b is correct

step-by-step explanation:

we have been given the following system of inequalities;

we are required to graph the solution to the system of inequalities. using a graphing tool, the graph of the system is as shown in the attachment. the continuous line represents the graph of while the dotted line represents .

answer:   rlly

step-by-step explanation:

answer:

your answer is: c. 196 7/8 in^3.

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3