Whats the cosine rule?

0

615

1

Whats the cosine rule?

Guest Sep 11, 2014

0 users composing answers..

Best Answer

+33653

+5

if the sides of a triangle are of length a, b and c, and the angles opposite these sides are labelled A, B and C respectively, then the cosine rule says:

$$a^2=b^2+c^2-2\times b\times c\times cosA$$

Alan Sep 11, 2014

1⁺⁰ Answers

+33653

+5

Best Answer

if the sides of a triangle are of length a, b and c, and the angles opposite these sides are labelled A, B and C respectively, then the cosine rule says:

$$a^2=b^2+c^2-2\times b\times c\times cosA$$

Alan Sep 11, 2014

0 Online Users