ALEX Classroom Resource


Ellipse Foci Review

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Ellipse Foci Review


Content Source:

Khan Academy
Type: Learning Activity


In this activity from Khan Academy, students will review their knowledge of the foci of an ellipse. This activity has an embedded video, practice problem with an immediate check for the correctness of the answer, an explanation option, and more practice choice at the end of the lesson. This review can be assigned to Google Classroom

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Content Standard(s):
MA2015 (2016)
Grade: 9-12
37 ) (+) Derive the equations of ellipses and hyperbolas given the foci, using the fact that the sum or difference of distances from the foci is constant. [G-GPE3]

Tags: ellipse, foci
License Type: Custom Permission Type
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Partnered Event: ALEX Resource Development Summit
AccessibilityText Resources: Content is organized under headings and subheadings

2019 ALCOS

Precalculus 37). Use trigonometric identities to solve problems.

a. Use the Pythagorean identity sin^2 (θ) + cos^2(θ) = 1 to derive the other forms of the identity.
Example: 1 + cot^2 (θ) = csc^2 (θ)

b. Use the angle sum formulas for sine, cosine, and tangent to derive the double angle formulas.

c. Use the Pythagorean and double angle identities to prove other simple identities.

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