Materi Perbandingan Trigonometri Presentasi

6 Slides • 5 Questions

1

Materi Perbandingan Trigonometri

Purnama Situmorang

2

Tujuan Pembelajaran

Siswa mampu menjelaskan perbandingan trigonometri dalam segitiga siku-siku
Siswa mampu menentukan perbandingan trigonometri dalam segitiga siku-siku

3

Perbandingan trigonometri segitiga ABC yang siku-siku di C didefenisikan sebagai:

$\sin A=\frac{sisi\ depan\ sudutA}{sisi\ miring}=\frac{a}{c}$
$\cos A=\frac{sisi\ samping\ sudutA}{sisi\ miring}=\frac{b}{c}$
$\tan A=\frac{sisi\ depan\ sudutA}{sisi\ samping\ sudutA}=\frac{a}{b}$

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Contoh:

Tentukan nilai sin K, cos K, dan tan K dari gambar segitiga KLM

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Jawab:

\sin K=\frac{LM}{KM}=\frac{\sqrt{3}}{2}=\frac{1}{2}\sqrt{3}

\cos K=\frac{KL}{KM}=\frac{1}{2}

\tan K=\frac{LM}{KL}=\frac{\sqrt{3}}{1}=\sqrt{3}

6

Multiple Choice

Panjang AC pada segitiga ABC di atas adalah ....

1

20

2

17

3

19

4

21

5

18

7

Multiple Choice

Sisi yang berada berhadapan dengan sudut siku-siku dinamakan sisi ....

1

miring

2

samping

3

depan

4

tegak

5

datar

8

Multiple Choice

Nilai $\sin\alpha$ adalah ....

1

$\frac{1}{5}$

2

$\frac{3}{5}$

3

$\frac{5}{3}$

4

$\frac{5}{4}$

5

$\frac{4}{5}$

9

Multiple Choice

Nilai dari $\cos\alpha$ pada segitiga ABC adalah....

1

$\frac{5}{13}$

2

$\frac{13}{15}$

3

$\frac{12}{13}$

4

$\frac{13}{5}$

5

$\frac{12}{5}$

10

Multiple Choice

Perbandingan antara sisi samping dan sisi miring pada segitiga siku-siku dalam trgionometri disebut ....

1

cosecan

2

sinus

3

cosinus

4

secan

5

tangen

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Apa yang dapat kalian simpulkan setelah mengikuti kegiatan pembelajaran hari ini?

Materi Perbandingan Trigonometri

Purnama Situmorang

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