Blogs about: Trigonometry
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Plane Trigonometry – Article 122
Article 122 – The value of and may also be found geometrically as follows. (Pages 127-128.) Let triangle ABC be constructed as in Euclid Book 4 Proposition 10 ( To construct an isosceles triangl… more →
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Pushing Advanced Math -- Pros and Cons
wrote 1 day ago: Two things motivated this post: Thomas Jefferson High School for Science and Technology (TJ) is havi … more →
Segment 26: The Man in the Truck
wrote 2 days ago: In the teacher’s hall by the breakroom I could hear music playing by a book shelf filled with test p … more →
Drafting & Color Theory Exploration
wrote 2 days ago: Expansion of general perspective, shape, and light relativity concepts. Oil on newsprint, 12×14 … more →
Trigonometry Question: Level 2 [SOLVED]
wrote 2 days ago: This question requires a bit of manipulation to arrive at the final answer. If you can see it then i … more →
Cofunction Identities
wrote 4 days ago: This video explains the cofunction identities and how to determine cofunctions given a function valu … more →
Cofunction Identities - Solving Trigonometric Equations
wrote 4 days ago: This video explains how to use cofunction identities to solve trigonometric equations. … more →
Pt. 3 Working Backwards: Finding a Vector Given Magnitude and Direction Angle
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wrote 1 week ago: Hello, In the third part of this lecture, we will be culminating our new-found knowledge to derive … more →
JavaFX 2 GameTutorial Part 3
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wrote 1 week ago: figure 1 The Expanse – Input (Keyboard & Mouse) Demo Introduction This is part 3 of a six … more →
How to compute arctangent if you live in the 18th century
wrote 1 week ago: Michael Lugo wrote a great post, following an idea of Andrew Gelman, about what would have happened … more →
Trig Angle Addition Formulas
wrote 1 week ago: Original proof by Sunny Snaith. Here’s my own “Proof by Picture” of the Angle Addi … more →
Double Angle Trigonometric Formulas
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wrote 1 week ago: Problem: Derive the double angle identities Solution: Recall from linear algebra how one rotates a p … more →
Casio fx Series Programs
wrote 2 weeks ago: I bought a Casio fx-9750g plus back in highschool when I needed a graphing calculator for math (pro … more →
Polar Graphing Surprise
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wrote 3 weeks ago: Nurfatimah Merchant and I were playing around with polar graphs, trying to find something that would … more →
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wrote 3 weeks ago: http://www.zazzle.com/nyc_landmarks_iphone_case_design_59_cricketdiane-179405735110580299?gl=Cricket … more →
As the votes are being tallied....
wrote 3 weeks ago: I’ve done everything I can for this semester, and it’s almost complete. I earned a 96% i … more →
Find all solutions to a Trig Function
wrote 3 weeks ago: Q: Find all solutions for X where 0 < X < 360 degrees and 9*cos(X) – 5 = 0. Answer: Oka … more →
Simplifying Trig Functions Using Identities
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wrote 3 weeks ago: Q: Simplify cos4t – sin4t Answer: First thing we gotta notice is that this is a difference of … more →
Amplitude, Phase Shift and Period
wrote 3 weeks ago: Q: Consider the function y = -5 cos (2x – .1*pi) a) Identify the amplitude b) Identify the … more →
Rainy cloudy spring day
wrote 3 weeks ago: I would love to be sitting in a warm coffee shop reading the rest of my cormac book. But instead I a … more →
