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plantkiana677oxa6hk
11.10.2020 •
Mathematics
In AJKL, the measure of L=90°, KJ = 61, LK = 11, and JL = 60. What ratio represents the tangent of ZJ?
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Ответ:
Step-by-step explanation:
we know that
The ellipse has directrices at > given
The directrices has equation:
where e is the eccentricity of the ellipse.
so
> equation A
Remember that the foci are given by:
In this problem
The foci are at (0,2) and (0,-2)
so
> equation B
Solve the system of equations A and B
substitute equation A in equation B
Find the value of a
We know,
Substituting the values, we get
The equation of the ellipse is given by:
we have
substitute
therefore
x squared over 4 plus y squared over 8 equals 1