yodeamisstefinabde
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 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

why did Einstein urge the president to authorize the Manhattan Project
Write one number that is a factor of 13
if you have drums that hold 60 gallons and you need to ship out 5,300 liters of liquid how many drums will you need remember 1 liter = .26 gallons
What statement best summarizes the plot of the Divine Comedy?
The last two lines in a Shakespearean sonnet are always
His hope and dream _______ finding true love. A. is B. always C. are D. with
Water Pollution soil contamination and the destruction of animals habitats are common negative consequences of
a .35 m solution of weak acid, HX, has a h+ of 4.15×10^-3. what is the value of ka for this acid
there are three source of resistance in parallel circuit. Two of them are rated at 20 ohms, the other at 10 ohms. What is the circuits total resistance
how unemployment is impacting on the south africa economy?