Penjelasan dengan langkah-langkah:

No.1

Cari Dulu PQ

PQ² = PR²- RQ²

PQ² = 13² - 12²

PQ² = 169 - 144

PQ² = 25

PQ = 5 cm

Tentukan :

a. sin P = de/mi = 12/13

b. cos P = sa/mi = 5/13

c. tan P = de/sa = 12/5

d. cosec P = 1/sin P = 13/12

e. sec P = 1/cos P = 13/5

f. cot P = 1/tan P = 5/12

a. sin R = de/mi = 5/13

b. cos R = sa/mi = 12/13

c. tan R = de/sa = 5/12

d. cosec R = 1/sin R = 13/5

e. sec R = 1/cos R = 13/12

f. cot R = 1/tan R = 12/5

No.2

Cari dulu BC

BC² = AB² + AC²

BC² = 8² + 15²

BC² = 64 + 225

BC² = 189

BC = 17 cm

Tentukan :

a. sin B = de/mi = 15/17

b. cos B = sa/mi = 8/17

c. tan B = de/sa = 15/8

d. cosec B = 1/sin B = 17/15

e. sec B = 1/cos B = 17/8

f. cot B = 1/tan B = 8/15

a. sin C = de/mi = 8/17

b. cos C = sa/mi = 15/17

c. tan C = de/sa = 8/15

d. cosec C = 1/sin C = 17/8

e. sec C = 1/cos C = 17/15

f. cot C = 1/tan C = 15/8