Cari terlebih dahulu alas segitiga (a)
a² = s² - t²
a² = 15² - 12²
a² = 225 - 144
a² = 81
a = √81
a = 9
sin a = sisi depan/sisi miring
sin a = a/s
sin a = 9/15
sin a = 3/5
cos a = sisi samping/sisi miring
coa a = t/s
cos a = 12/15
cos a = 4/5
tan a = sisi depan/sisi samping
tan a = a/t
tan a = 9/12
tan a = 3/4
tan a = sin a/cos a
tan a = (3/5)/(4/5)
Mapel: Matematika
Kelas: X
Materi: Bab 7 - Trigonometri
Kode Kategorisasi: 10.2.7
Penjelasan dengan langkah-langkah:
a = √(c² - b²)
a = √(15² - 12²)
a = √(225 - 144)
a. sin ɑ
= a/c
= 9/15
= 3/5
b. cos ɑ
= b/c
= 12/15
c. tan ɑ
= a/b
= 9/12
= 3/4
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Cari terlebih dahulu alas segitiga (a)
a² = s² - t²
a² = 15² - 12²
a² = 225 - 144
a² = 81
a = √81
a = 9
sin a = sisi depan/sisi miring
sin a = a/s
sin a = 9/15
sin a = 3/5
cos a = sisi samping/sisi miring
coa a = t/s
cos a = 12/15
cos a = 4/5
tan a = sisi depan/sisi samping
tan a = a/t
tan a = 9/12
tan a = 3/4
tan a = sin a/cos a
tan a = (3/5)/(4/5)
tan a = 3/4
_______________
DETAIL JAWABAN
Mapel: Matematika
Kelas: X
Materi: Bab 7 - Trigonometri
Kode Kategorisasi: 10.2.7
Penjelasan dengan langkah-langkah:
a = √(c² - b²)
a = √(15² - 12²)
a = √(225 - 144)
a = √81
a = 9
a. sin ɑ
= a/c
= 9/15
= 3/5
b. cos ɑ
= b/c
= 12/15
c. tan ɑ
= a/b
= 9/12
= 3/4