Latihan Mtk.docx

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PERBANDINGAN DAN SUDUT ISTIMEWA

𝑦

π‘ π‘–π‘›πœƒ =

r

π‘Ÿ

y

1

π‘Ÿ

1

π‘Ÿ

↔ π‘π‘ π‘πœƒ = π‘ π‘–π‘›πœƒ = 𝑦

π‘₯

π‘π‘œπ‘ πœƒ = π‘Ÿ ↔ π‘ π‘’π‘πœƒ = π‘π‘œπ‘ πœƒ = π‘₯

πœƒ

π‘‘π‘Žπ‘›πœƒ =

𝑦 π‘₯

x Keterangan

:

X = Sisi Samping Y = Sisi depan R = Sisi miring (hipotenusa) Berlaku teorema phytagoras, yaitu : π‘₯Β² + 𝑦² = π‘ŸΒ² Menggunakan hubungan phytagoras π‘₯Β² + 𝑦² = π‘ŸΒ², diperoleh identitas trigonometri sin Β²π‘Ž + π‘π‘œπ‘ Β²π‘Ž = 1 π‘‘π‘Žπ‘›2 π‘Ž + 1 = 𝑠𝑒𝑐 2 π‘Ž 1 + π‘π‘œπ‘›π‘‘π‘Žπ‘›2 = 𝑠𝑒𝑐 2 π‘Ž Nilai fungsi trigonometri untuk sudut – sudut istimewa adalah sebagai berikut :

πœƒ

0Β²

30ΒΊ

40ΒΊ

60ΒΊ

90ΒΊ

π‘ π‘–π‘›πœƒ

0

1 2

1 √2 2

1 √3 2

1

π‘π‘œπ‘ πœƒ

1

1 √3 2

1 √2 2

1 2

0

π‘‘π‘Žπ‘›πœƒ

0

1 √3 3

1

√3

Tak terdefinisi

90ΒΊ KII

KI

sin & cosec bernilai (+)

180 ΒΊ

Semua bernilai (+)

0ΒΊ360ΒΊ KIII

KIV

tan & cot bernilai (+)

cos & sec bernilai (+)

270ΒΊ

1

π‘₯

↔ π‘π‘œπ‘‘πœƒ = π‘‘π‘Žπ‘›πœƒ = 7

SUDUT BERELASI & KUADRAN

I

-y

II (0,1)

B B 1 ( -1 , 0 )

(1,0)

πœƒ A

-x

III

( 0 , -1 )

B

-y

π‘ π‘–π‘›πœƒ =

𝐡𝐡 𝐴𝐡 βˆ— 𝐴𝐡 𝐴𝐡

π‘π‘œπ‘‘πœƒ =

𝐴𝐡 𝐡𝐡 βˆ— 𝐡𝐡 𝐴𝐡

π‘π‘œπ‘ πœƒ =

𝐴𝐡 𝐡𝐡 βˆ— 𝐴𝐡 𝐴𝐡

π‘ π‘’π‘πœƒ =

𝐴𝐡 𝐴𝐡 βˆ— 𝐴𝐡 𝐡𝐡

π‘‘π‘Žπ‘›πœƒ =

𝐡𝐡 𝐴𝐡 βˆ— 𝐴𝐡 𝐴𝐡

π‘π‘ π‘πœƒ =

𝐴𝐡 𝐴𝐡 βˆ— 𝐡𝐡 𝐴𝐡

-x

IV

SUDUT BERELASI Kuadran II

Kuadran I

y

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