# Daily Archives: June 23, 2019

295 posts ## Trigonometry – Sum and Difference of Angles Identities

In this “State of the Triangle” teaching address, President ObaMATH explores how to apply sum and difference identities with trigonometry. Trig sum and difference formulas help us evaluate sin, cos, tan, csc, sec, and cot of non special right triangle angles, like sin 15°, for example. Um, get ready to sing with us, seriously? Seriously.… ## Trigonometric Graphs and the Unit Circle

This video shows how graphs of sine, cosine and tangent are made from information in the unit circle! Grab a pen and graph paper and work along with the video. Remember, you can pause and rewind whenever you want!! ## Trigonometric Ratios Table

CBSE Class 10 Maths – Introduction to Trigonometry – We will learn to create the trignometry table of some specific angles in a very simplified manner. Trigonometry concepts covered in full chapter What is Trigonometry / Importance of trigonometry Trigonometry basics Trigonometric ratios of 0 and 90 degree Trigonometric ratios of 30 and 60 degree… ## Solving Trigonometric Equations By Factoring & By Using Double Angle Identities

This trigonometry video tutorial explains how to solve trigonometric equations by factoring and by using double angle formulas and identities. It explains how to factor trigonometric expressions using the difference of perfect squares method and the same techniques used to factor trinomials in algebra. New Trigonometry Playlist: https://www.youtube.com/watch?v=oxhXz9_uyiM&index=1&list=PL0o_zxa4K1BVCB8iCVCGOES9pEF6byTMT Access to Premium Videos: https://www.patreon.com/MathScienceTutor https://www.facebook.com/MathScienceTutoring/ ## Learn how to evaluate the limit at infinity of a trigonometric function

We will explore how to evaluate the limit at infinity. When evaluating the limit at infinity or negative infinity we are interested to know where is the graph going right and left. This is also commonly explored as end behavior of the graph. Most of the examples we will look at will include rational functions.… ## How to Graph Trigonometric Functions (1 of 2: Sine) ## If a, b, and c are all positive constants and y(x) is a solution of the differential equation

If a,b, and c are all positive constants and y(x) is a solution of the differential equation ay”+by’+cy=0, show that lim_(x→∞)⁡y(x)=0. Leave a tip for good service: https://paypal.me/jjthetutor Student Solution Manuals: https://amzn.to/2WZrFnD More help via http://jjthetutor.com Download my eBooks via http://payhip.com/jjthetutor, paperback via http://amazon.com/author/jjthetutor. ## Lesson 1.0 – Unit Conversion, Significant Figures, and Strategizing – Neptunium. In the fall of 2002

Question 1.11 Neptunium. In the fall of 2002, scientists at Los Alamos National Laboratory determined that the critical mass of Neptunium-237 is about 60 kg. The critical mass of a fissionable material is the mini-mum amount that must be brought together to start a nuclear chain reaction. Neptunium-237 has a density of 19.5 g/cm3. What… ## A light beam travels through quartz find the index of refraction A light beam travel

Leave a tip for good service: https://paypal.me/jjthetutor A light beam travels at 1.94×108ms in quartz. The wavelength of the light in quartz is 355mm What is the index of refraction and what is the wavelength in air? Student Solution Manuals: https://amzn.to/2WZrFnD More help via http://jjthetutor.com Download my eBooks via http://payhip.com/jjthetutor, paperback via http://amazon.com/author/jjthetutor. ## y = 1 / (1 + ce^(-x)) is a one-parameter family of solutions to the first-order DE y’ = y – y^2

Leave a tip for good service: https://paypal.me/jjthetutor Student Solution Manuals: https://amzn.to/2WZrFnD More help via http://jjthetutor.com Download my eBooks via http://payhip.com/jjthetutor, paperback via http://amazon.com/author/jjthetutor. ## Area Between Curves: The parabola y=3-x^2 and line y=x+1

Leave a tip for good service: https://paypal.me/jjthetutor Student Solution Manuals: https://amzn.to/2WZrFnD More help via http://jjthetutor.com Download my eBooks via http://payhip.com/jjthetutor, paperback via http://amazon.com/author/jjthetutor. ## Solve for x in this radical equation 3x^(4/3) + 5x^(2/3) – 2 = 0

Leave a tip for good service: https://paypal.me/jjthetutor Student Solution Manuals: https://amzn.to/2WZrFnD More help via http://jjthetutor.com Download my eBooks via http://payhip.com/jjthetutor, paperback via http://amazon.com/author/jjthetutor. ## You normally drive on the freeway between San Diego and Los Angeles at an average speed of km/h

You normally drive on the freeway between San Diego and Los Angeles at an average speed of 104 km/h (65 mi/h), and the trip takes 2 h and 21 min. On a Friday afternoon, however, heavy traffic slows you down and you drive the same distance at an average speed of only 69 km/h (43… ## How to Insert or Delete Numbers and or Characters on a TI 84

Leave a tip for good service: https://paypal.me/jjthetutor Student Solution Manuals: https://amzn.to/2WZrFnD More help via http://jjthetutor.com Download my eBooks via http://payhip.com/jjthetutor, paperback via http://amazon.com/author/jjthetutor. ## A squirrel has x-coordinates and y-coordinates 11.1 m, 3.4 m2 at time t1 = 0

Leave a tip for good service: https://paypal.me/jjthetutor A squirrel has x-coordinates and y-coordinates 11.1 m, 3.4 m2 at time t1 = 0 and coordinates 15.3 m, -0.5 m2 at time t2 = 3.0 s. For this time interval, find (a) the components of the average velocity, and (b) the magnitude and direction of the average… ## Lesson 4 – Linear Transformations – Images Under T

Leave a tip for good service: https://paypal.me/jjthetutor Student Solution Manuals: https://amzn.to/2WZrFnD More help via http://jjthetutor.com Download my eBooks via http://payhip.com/jjthetutor, paperback via http://amazon.com/author/jjthetutor. ## The Kernel of a Group Homomorphism – Abstract Algebra

The kernel of a group homomorphism measures how far off it is from being one-to-one (an injection). Suppose you have a group homomorphism f:G → H. The kernel is the set of all elements in G which map to the identity element in H. It is a subgroup in G and it depends on f.… ## College Algebra Course Overview ## Cyclic Groups (Abstract Algebra)

Cyclic groups are the building blocks of abelian groups. There are finite and infinite cyclic groups. In this video we will define cyclic groups, give a list of all cyclic groups, talk about the name “cyclic,” and see why they are so essential in abstract algebra. If​ ​you​’d​ ​like​ ​to​ ​help​ ​us​ ​make​ ​videos more… ## Lær algebra på 50 minutter

Lær de matematiske regneregler på kun 50 minutter. Videoen gennemgår basale regneregler for multiplikation, addition, division og subtraktion. Potensregneregler for produkt, kvotient og potens gennemgås. Brøkregneregler, kvadratsætningerne, og roduddragning. DTU Adgangskursus. ## PreCalculus – Algebra Fundamental Review (30 of 80) Review of Word Problems: Rate of Doing Work

Visit http://ilectureonline.com for more math and science lectures! In this video I will find how much time it would take if John, Gary and Fred all painted together, if John can paint a garage in 8 hours, Gary can do it in 6 hours, and Fred can do it in 4 hours. ## PreCalculus – Algebra Review: Conic Sections (19 of 25) The Ellipse: Ex. 2

Visit http://ilectureonline.com for more math and science lectures! In this video I will graph (ellipse) 4x^2+y^2-8x-2y+1=0. Next video in this series can be seen at: http://youtu.be/I1oSpVBbOyM ## Geometric series convergence and divergence examples | Precalculus | Khan Academy

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/precalculus/seq_induction/infinite-geometric-series/v/repeating-decimal-geometric-series?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Watch the next lesson: https://www.khanacademy.org/math/precalculus/seq_induction/infinite-geometric-series/v/geometric-series-convergence-divergence?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Missed the previous lesson? https://www.khanacademy.org/math/precalculus/seq_induction/infinite-geometric-series/v/deriving-geometric-series-sum-formula?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Precalculus on Khan Academy: You may think that precalculus is simply the course you take before calculus. You would be right, of course, but that definition doesn’t mean anything unless you have some knowledge of what… ## Difference Quotient – What is it? (PreCalculus)

How to find the Difference Quotient. We discuss how the difference quotient represents a formula for the slope between points but as the distance between the two points decreases you get the instant rate of change or the slope of the tangent line. 0:04 What is the Difference Quotient 0:11 Formula for the Difference Quotient… ## PreCalculus – Trigonometry: Trig Identities (47 of 57) Solve tan^2(theta)-4=0, theta=?

Visit http://ilectureonline.com for more math and science lectures! In this video I will solve tan^2(theta)-4=0, theta=? ## PRECALCULUS: FINDING THE DOMAIN OF RATIONAL FUNCTIONS

This algebra lesson shows you how to compute for the domain of a rational function by finding the root of the denominator. This method is the algebraic way on how to find the domain of a function in rational form. ## Trigonometry CAST diagrams and equations

Trigonometry at AS/A Level includes solving trigonometric equations, and finding multiple solutions using a CAST diagram (or graph). In this video I introduce the CAST diagram and how to use it so solve equations. This is a notoriously difficult topic to teach so I’ve done my best – hope it makes sense! What’s included: -Solving…