Which equation can be used to find the measure of angle ljk?

Asked by maham237 @ 02/12/2020 in Mathematics viewed by 452 People

sin(x) = (10/15)
sin(x) = (15/10)
cos(x) = (10/15)
cos(x) = (15/10)

Answered by maham237 @ 02/12/2020

we know that

In the right triangle LJK

m∠LJK°=m∠x°

$cos\ x=\frac{adjacent\ side\ angle\ x}{hypotenuse}$

in this problem

$adjacent\ side\ angle\ x=JL=10\ in\\ hypotenuse=KJ=15\ in$

substitute

$cos\ x=\frac{10}{15}$

therefore

the answer is the option

$cos\ x=\frac{10}{15}$

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