Diket sin teta = 3/4, 90 derajat .... Question from @davidadi997

August 2018 2 93 Report

Diket sin teta = 3/4, 90 derajat <= teta <= 180 derajat. tent nilai Cos teta dan tan teta ?

saripuddin Sin teta = 3/4 = y/r x=akar 16-9= akar 7 jadi: cos teta = 1/4 akar 7 tangen teta = 3/7 akar 7

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sonasultananasirah $sin \theta = \frac{3}{4}$
$sin \theta = 
\frac{depan}{miring}$ , $cos \theta = \frac{samping}{miring} 
$ , $tan \theta = \frac{depan}{samping}$

berarti :
depan = 3
miring = 4
samping = $\sqrt{7}$ (gunakan rumus pitagoras)

$cos \theta = \frac{samping}{miring}$
$cos \theta = \frac{ \sqrt{7} }{4}$

$tan \theta = \frac{depan}{samping}$
$tan \theta = \frac{3}{ \sqrt{7}}$
$tan \theta = \frac{3}{ \sqrt{7}} . \frac{ \sqrt{7} }{ \sqrt{7}}$
$tan \theta = \frac{3}{7} \sqrt{7}$

semoga membantu :)

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