dik : sin teta 5 per 7 tentukan : a. cos teta b.. tan teta c. sec teta d. cosec teta e. cot teta

Bab Trigonometri
Matematika SMA Kelas X

sin a = 5/7 = y/r
x = √(r² - y²)
x = √(7² - 5²)
x = √(49 - 25)
x = √24
x = 2√6

a] cos a = x/r
cos a = (2√6)/7
cos a = (2/7) √6

b] tan a = y/x
tan a = 5 / (2√6)
tan a = (5/12) √6

c] sec a = 1/cos a
sec a = 7/(2√6)
sec a = (7/12) √6

d] cosec a = 1/sin a
cosec a = 7/5

e] cot a = 1/ tan a
cot a = 12/(5√6)
cot a = (2/5) √6