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

what does the numerator tell us in fraction
what does the numerator tell us in fraction
What do you think was the most serious problem faced by settlers in Virginia? Why?
A uniform wire is cut into 4 segments. Each segment is twice as long as the earlier segment. If the shortest segment has a resistance of 4 ohm, find the resista
A uniform wire is cut into 4 segments. Each segment is twice as long as the earlier segment. If the shortest segment has a resistance of 4 ohm, find the resista
True or false. If a line L1has equation y = mx + b, where m and b are constants with m ≠ 0, then an equation of a line L2 perpendicular to L1 has the form y = -
Help me please. What Is Stonehenge?
Acme Inc. spent $870 less on postage than on supplies. The ratio of postage costs to supply costs was 2 to 5. How much did Acme spend on postage? Solve this pro
factoring-16w²+50wz-21z²  please help me solve
information about tigers