Question

In triangle PQR, if PQ:QR:PR = 8:15:17, then evaluate
1) cos P . cos R - sin P . sin R

2) tan P - tan R / 1+tan P . tan R​

Answer 1

Answer:

your answer will => 3/5

cos p = b/h

sin r = p/h

because pq will be base cos p and perpendicular for sir r

now by using the Pythagorean theorem.

Answer 2

Step-by-step explanation:

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