materi trigonometri (kelas x)
TRANSCRIPT
Perbandingan
Trigonometri
Sudut-Sudut Istimewa
0 30 4 60 90
Sin 0 1
Cos 1 0
Tann 0 1 0
KUNCI SUKSES MATERI
TRIGONOMETRI
WAJIB DI
HAFALKAN !!!
NILAI PERBANDINGAN TRIGONOMETRI
RUMUS IDENTITAS
TRIGONOMETRI
RUMUS 1PENJUMLAHAN
SUDUT (sinus/cosinus)
RUMUS 2JUMLAH &
SELISIH SUDUT (sinus/cosinus)
RUMUS 3PERKALIAN
SUDUT (sinus/cosinus)
RUMUS 4TRIGONOMET
RI
NILAI PERBANDINGAN TRIGONOMETRI
Kuadran II(180
90 < 180Sin +
Kuadran I(90
< 90All +
Kuadran III(180
180 < 360Tan +
Kuadran IV(360Cos +
Contoh Soal
A.Sin 140 = … B.Cos 240 = …
Penyelesaian:B. Cos 240= Kuadran IIICos (18 240 Cos (1 240 = 6 Cos 60 =
Penyelesaian:A. Sin 135 = Kuadran IISin (180 135 Sin (180 135 = Sin =
Contoh Soal
Penyelesaian:A. Sin (45
= Sin 45 =. +. = +
B. Sin 36= Sin (36= Sin 60=
Tentukan Nilai dari:A.Sin (45B.Sin 36
LATIHAN
SOAL
1. Cos (270)2. Sin (204)3. Tan (60)4. Sec (167)5. 60+606. 2. 60+2. 45+3. 457. Sin 1358. Cos(90-30)9. Cos 60-Cos 3010.Jika f(x) = (Cos x + Sin x) . Tentukan
nilai f(x),jika x = 45
PEMBAHASAN
SOAL
1. Cos (270) = K IIICos (180+) = 270Cos (180+) = 270
Cos
2. Sin (204) = K IIISin (180+) = 204Sin (180+) = 204
3. Tan (60) = K ITan (90) = 60Tan (90) = 60
Tan 3
4. Sec (167) = K IISec (180) = 167Sin (180) = 167
7. Sin 135 = (Sin 90+45)= = Sin 90.Cos 45+Cos 90.Sin 45= 1.+0. = 8. Cos(90-30)= Cos= Cos 90.Cos 45+Sin 90.Sin 45= .0+=