Triangle PQR with side p across from angle P, side q across from angle Q, and side r across from angle R

If ∠Q measures 18°, r equals 9.5, and p equals 6.0, then which length can be found using the Law of Cosines?

r

p

PR

PQ

Question

Mathematics

Lamont Kim

31 May, 00:32

Triangle PQR with side p across from angle P, side q across from angle Q, and side r across from angle R

If ∠Q measures 18°, r equals 9.5, and p equals 6.0, then which length can be found using the Law of Cosines?

r

p

PR

PQ

+3

Answers (1)

Know the Answer?

Ignacio Odom · Answer 1

PR

Step-by-step explanation:

Law of cosine expression for the triangle will be

q² = r² + p² - 2 (rp) cos Q

going by the equation r and p is given and Q is included then we can calculate q which corresponds to PR which faces or is subtended by angle Q. p correspond to QR and r correspond to PQ.

Triangle PQR with side p across from angle P, side q across from angle Q, and side r across from angle RIf ∠Q measures 18°, r equals 9.5, and p equals 6.0, then which length can be found using the Law of Cosines?rpPRPQ

Triangle PQR with side p across from angle P, side q across from angle Q, and side r across from angle R

If ∠Q measures 18°, r equals 9.5, and p equals 6.0, then which length can be found using the Law of Cosines?

r

p

PR

PQ