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 is the lcf of 4 and 5

3. Yesterday was _ (hot) day of the year.

30% of the people at a concert are female. 1295 of the people at the concert are male. Work out the number of people at the concert who are female.

lucy starts 4miles from home and jogs away from home at 6mph for 20minutes. draw this statement on the diagram for me please.

A company had $6,992,000 in net income for the year. Its net sales were $15,200,000 for the same period. Calculate its profit margin.

Peter runs 200 m in 30 s, while his sister Eva runs 300 m in 36 s. a) Who is the faster runner? Explain how you can tell. b) At the same rate, how far will each

what is the value of x?

In the cuboid below, tan(A) = 3 tan(B) = 4 Work out the value of tan(C). If your answer is a decimal, give it to 1 d.p.

Find the area of square alone woodside 72 metre

explain the phrase "Togetherness is strength"