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

I really need help! Geometry is not my strong-hold
Read the following sensory details. crackly voice, sweaty palms, reddened face, churning stomach These details would best be used to describe a person who is
what's the answer and how do I solve it?
Why did Western European economies grow faster than Eastern European economies after World War lI?
Find the number of real number solutions for each equation
Question 15 (Matching Worth 10 points) Match the following with the most logical answers. Match Term Definition El hueso A) Pedro va al ________ para ver obras
What is 2852÷12? Please help!!
The music the Medieval monks sang was called A. contemporary gospel. B. Gregorian chant. C. estampies. D. Trouvère songs.
I need help for question 8
What is the difference between 4Σn=1, 2n+1 and 4Σi=1, (2i+1)? a. 0 b. 3 c. 4 d. 7