tolong kk yang cantikk.... Question from @ayuumi1909

ayuumi1909 @ayuumi1909

August 2022 2 5 Report

tolong kk yang cantikk

DB45

trigonometri
segitiga siku
triple pythagoras

Penjelasan dengan langkah-langkah:

pada gambar segitiga

ΔABC siku di A
AB = 3 , AC = 4
$\sf BC= \sqrt{AB^2 + AC^2} = \sqrt{3^2+4^2}= \sqrt {25} = 5$

sudut B = α
cosec α = 1/sin α
cosec α = BC/AC
cosec α = 5/4

0 votes Thanks 1

ArtX1

• Diketahui :

Panjang AB = 3

Panjang AC = 4

Ditanya :

Cosec a?

Jawab :

Menentukan panjang BC

$BC² = AB² + AC²$

$BC² = 3² + 4²$

$BC² = (3 × 3) + (4 × 4)$

$BC² = 9 + 16$

$BC² = 25$

$BC = \sqrt{25}$

$BC = 5$

Menentukan nilai cosec a

$\cosec( \alpha ) = \frac{1}{ \sin( \alpha ) }$

$\cosec( \alpha ) = \frac{panjang \: bc}{panjang \: ac}$

$\cosec( \alpha ) = \frac{5}{4}$

$\cosec( \alpha ) = 1 \frac{1}{4}$

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