tentukan nilai sinus, cosinus, dan tangen utk sudut P dan R

pq = 1
qr = 2
pr = √(1²+2²) = √5

sin P = qr/pr = 2/(√5) = 2/5 √5
cos P = pq/pr = 1/(√5) = 1/5 √5
tan P = qr/pq = 2/1 = 2

sin R = pq/pr = 1/(√5) = 1/5 √5
cos R = qr/pr = 2/(√5) = 2/5 √5
tan R = pq/qr = 1/2