Jawaban:

a. sin α = de/mi = 9/15

de = √15² - 12² = √225 - 144 = √81 = 9

cos α = sa/mi = 12/15

tan α = de/sa = 9/12

sec α = 1/cos α = 1/12/15 = 15/12

cosec α = 1/sin α = 1/9/15 = 15/9

cot α = 1/tan α = 1/9/12 = 12/9

b. sisi miring = √12² + 5² = √144 + 25 = √169 = 13

sin α = 12/13

cos α = 5/13

tan α = 12/5

sec α = 13/5

cosec α = 13/12

cot α = 5/12

c. sisi miring = √24²+ 7²

= √576 + 49

= √625

= 25

√25² - 20² = √625 - 400 = √225 = 15

sin α = 15/25

cos α = 20/25

tan α = 15/20

sec α = 25/20

cosec α = 25/15

cot α = 20/15

Mohon dicek lagi, Kak.