Question

Which equation can be used to find the measure of angle LKJ? cos−1(StartFraction 8.9 Over 10.9 EndFraction) = x cos−1(StartFraction 10.9 Over 8.9 EndFraction) = x sin−1(StartFraction 10.9 Over 8.9 EndFraction) = x sin−1(StartFraction 8.9 Over 10.9 EndFraction) = x

Answer 1

Answer is D

Explanation:

Answer 2

`x=sin^-1((8.9)/(10.9))`

Explanation:

see the attached figure to better understand the problem

we know that

In the right triangle LKJ of the figure

The sine of angle LKJ (x) is equal to divide the opposite side to angle LKJ (LJ) by the hypotenuse of the right triangle (KJ)

so

substitute the given values

`sin(x)=(8.9)/(10.9)`

therefore

`x=sin^-1((8.9)/(10.9))`