Mathematics, 10.04.2021 05:50, mahalabear8120

If A+B+C=180 Then prove that
cos(B+C-A)+cos(C+A-B)+cos(A+B-C)= 1+4CosA. cosB. cosC

Answers: 2

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 14:10, qqbear4555

What is an equation of the line that passes through the point (-2,3) and is parallel to the line whose equations is y=3/2x-4? i am stuck between y=3/2x or y=3/2x+6 : (

Answers: 2

continue

Mathematics, 21.06.2019 14:30, GxthGrl6612

The jurassic zoo charges $14 for each adult admission and $5 for each child. the total bill for 77 people from a school trip was $565. how many adults and how many children went to the zoo? i

Answers: 2

continue

Mathematics, 21.06.2019 17:30, Zeniko

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Answers: 1

continue

Mathematics, 21.06.2019 19:30, ramoj0569

If you could answer these your a life saver

Answers: 2

continue

Do you know the correct answer?

If A+B+C=180 Then prove that
cos(B+C-A)+cos(C+A-B)+cos(A+B-C)= 1+4CosA. cosB. cosC...