yodeamisstefinabde yodeamisstefinabde

02-09-2016
Mathematics

contestada

If in triangle ABC, a=5, b=6 and c=8, then cos A is...

Respuesta :

meerkat18 meerkat18

08-09-2016

In a triangle, the nomenclature is that a variable side a is opposite of the angle A. we can use the cosine law to determine the value of cosine A.
a2 = b2 + c2 -2bc cos a25 = 36 + 64 - 2*6*8 * cos acos a = 25/32

Answer Link

Otras preguntas

What role did the stock market crash play in the collapse of the economy??

Svetlana's hair is 4 centimeters long. her hair grows 1.5 centimeters per month. svetlana wants her hair to grow so that it is at least 7 centimeters long. writ

What perspective did Americans have on the Reagan Doctrine? A) Americans believed that Reagan’s policies prolonged the Soviet-Afghan War. B) Americans believed

True or False: Making a plan to exercise more and lose 5 pounds in 2 weeks is an example of a long term goal. True False

when a driver touches a car's steering wheel on a hot day, heat is transferred to the driver's hands by what? electromagnetism, conduction,convection,or radiati

Lucentio may marry Bianca if vincentio?

In My Bondage and My freedom by Fredrick Douglass, which adjective best describes Douglass as a child ?

9/16 dark blue: 6/16 light blue: 1/16 white

WILL CHOSE THE BRAINLIEST!!! NEED HELP FAST!!!

is 6/8 greater then 8/10