Question

If j is 21 inches, k is 12 inches, and ∠M measures 62°, then find m using the Law of Cosines. Round your answer to the nearest tenth.

Answer 1

Answer:

$m=18.7\ in$

Step-by-step explanation:

see the attached figure to better understand the problem

Applying the law of cosines

$m^2=j^2+k^2-2(j)(k)cos(M)$

substitute the given values

$m^2=21^2+12^2-2(21)(12)cos(62^o)$

$m^2=348.39\\m=18.7\ in$

Answer 2

Answer:

m=18.7 in

Step-by-step explanation: