From personal advice to professional guidance, IDNLearn.com has the answers you seek. Get thorough and trustworthy answers to your queries from our extensive network of knowledgeable professionals.
Given this is a right triangle
85^2 = 7225
84^2 = 7056
85^2 - 84^2 = 169 = 13^2
Sin QR / QP = sin 84 / 85 = 81.2 deg