# Daily Archives: June 21, 2019

491 posts ## Trigonometric Cofunctions

I introduce the concept of Cofunctions in Trigonometry and explain why and when they are equal. Check out http://www.ProfRobBob.com, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com ## Trigonometry: Triangles

This introduction to trigonometry explores the world of triangles using no equations. The concept of the triangle is introduced and the important types of triangles are defined and described. ## Trigonometric Maths Working Model

I have made a maths model for trigonometric ratios, the components required are: Tape, Scissors, a bulb, 1or 2 batteries, Few wires, Few nails and a box ## Sin Cos Tan – Basic Trigonometry – MathHelp.com

Like my video? Come to http://www.MathHelp.com and let’s do the complete lesson together! In this lesson, students learn to find the missing side lengths and the missing angle measures in right triangles using sine, cosine, and tangent. Note that a scientific or graphing calculator is required for the problems in this lesson. ## Modeling temperature through the day | Graphs of trig functions | Trigonometry | Khan Academy

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/trigonometry/trig-function-graphs/modeling-periodic-functions/e/modeling-with-periodic-functions?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry Watch the next lesson: https://www.khanacademy.org/math/trigonometry/trig-function-graphs/modeling-periodic-functions/v/modeling-periodic-function-with-shift?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry Missed the previous lesson? https://www.khanacademy.org/math/trigonometry/trig-function-graphs/modeling-periodic-functions/v/inverse-trig-with-model?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry Trigonometry on Khan Academy: Big, fancy word, right? Don’t be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry (“trig” as it’s sometimes called) has something to do with triangles. You would be… ## The Trigonometry of Sailing

Click here to subscribe ► http://bit.ly/2dPZNN2 We teamed up with US Sailing to examine the trigonometry of sailing through an experiment at the SUSTAIN Laboratory at the University of Miami’s Rosenstiel School of Marine & Atmospheric Science. To learn more about sailing and STEM education, visit reach.ussailing.org Check out the hurricane tank here ► http://bit.ly/2wfGAPh… ## Class 12 XII Maths CBSE Inverse Trigonometric Functions ## Math – Trigonometry – The Sine Rule

Expertmathstutor shows how and when to use the Sine Rule in Trigonometry when trying to find the length of an unknown side or the size of an unknown angle on a non right angled triangle. To buy a set of 7 DVD’s with all the lessons go to www.expertmathstutor.com ## Law of sines | Trig identities and examples | Trigonometry | Khan Academy

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/law-sines-cosines/e/law_of_sines?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry Watch the next lesson: https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/law-sines-cosines/v/law-of-sines-example?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry Missed the previous lesson? https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/law-sines-cosines/v/law-of-cosines-word-problem?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry Trigonometry on Khan Academy: Big, fancy word, right? Don’t be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry (“trig” as it’s sometimes called) has something to do with triangles. You would be… ## Determining the equation of a trig function | Graphs of trig functions | Trigonometry | Khan Academy

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/e/graphs-of-trigonometric-functions?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry Watch the next lesson: https://www.khanacademy.org/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/v/plotting-trig-features?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry Missed the previous lesson? https://www.khanacademy.org/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/v/matching-a-trigonometric-function-to-its-graph?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry Trigonometry on Khan Academy: Big, fancy word, right? Don’t be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry (“trig” as it’s sometimes called) has something to do with triangles. You would be… ## Parametric Equations Introduction, Eliminating The Paremeter t, Graphing Plane Curves, Precalculus

This precalculus video provides a basic introduction into parametric equations. It explains the process of eliminating the parameter t to get a rectangular equation of y in terms of an x variable. It also discusses how to graph plane curves which is the same as graphing parametric equations. This video is useful for high school… ## Precalculus – Trig 6 – Half Angle Formulas ## Matrix equations and systems | Matrices | Precalculus | Khan Academy

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/precalculus/precalc-matrices/matrix-equations/e/writing-systems-of-equations-as-matrix-equations?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Watch the next lesson: https://www.khanacademy.org/math/precalculus/precalc-matrices/matrix-equations/v/solving-matrix-equation?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Missed the previous lesson? https://www.khanacademy.org/math/precalculus/precalc-matrices/inverting_matrices/v/singular-matrices?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… ## Precalculus Final Exam Review

Precalculus Final Exam Review ## Precalculus – 6.4 Notes: Polar Coordinates

This lesson will show you how the basic steps that you will follow to use polar coordinates. Be sure to subscribe to Haselwoodmath to get all of the latest content! Follow me on Twitter https://twitter.com/HaselwoodMath or on Google+ http://goo.gl/YQLDNd ## PreCalculus – Trigonometry: Trig Identities (54 of 57) Solve sin(theta)+sin(3theta)=0, theta=?

Visit http://ilectureonline.com for more math and science lectures! In this video I will solve sin(theta)+sin(3theta)=0, theta=? ## PreCalculus How to relate hypotenuse to Perimeter of Right Triangle with 25 m^2 Area

Prepare for Calculus with selected examples e.mail: anil.anilkhandelwal@gmail.com https://www.youtube.com/watch?v=4qJ-1cTtBN8&list=PLJ-ma5dJyAqqFFg56tZaWRljDY6U8VJsQ ## Honors Precalculus Section 5.1 Trig Identities

Honors Precalculus Section 5.1 Trig Identities ## PreCalculus – Trigonometry (12 of 54) What Are Negative Angles?

Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what are negative angles and how to convert them to a positive angle within the unit circle. ## Classic video on inverting a 3×3 matrix part 2 | Matrices | Precalculus | Khan Academy

Using Gauss-Jordan elimination to invert a 3×3 matrix. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/precalculus/precalc-matrices/inverting_matrices/e/matrix_inverse_3x3?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Watch the next lesson: https://www.khanacademy.org/math/precalculus/precalc-matrices/inverting_matrices/v/singular-matrices?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Missed the previous lesson? https://www.khanacademy.org/math/precalculus/precalc-matrices/inverting_matrices/v/inverting-matrices-part-2?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… ## Simple TRICK to Write TRIGONOMETRY TABLE – Nothing to Remember | TRIGONOMETRY TRICKS

Trick to Remember TRIGONOMETRY TABLE – This Trigonometry table video lesson helps you to write & remember the trigonometric ratios of different angles from 0 degrees to 90 degrees without remembering any thing in the brain. In the previous video, we have remembered the sine table but here I am saying nothing to remember to… ## The unit circle definition of trigonometric function

Using the unit circle to extend the SOH CAH TOA definition of the basic trigonometric functions. ## Trigonometry – Finding the arc length of a circle

This video covers how you can use the formula for the arc length of a section of circle. A few of the examples work with finding different pieces of this formula. For more videos please visit http://www.mysecretmathtutor.com ## TRIGONOMETRY | त्रिकोणमिति | CLASS 1 | Parimal Sir | ICS COACHING CENTRE

TRIGONOMETRY | त्रिकोणमिति | CLASS 1 | Parimal Sir | ICS COACHING CENTRE Click here to watch : Percentage | प्रतिशत | Class – 6 | Parimal Sir | ICS COACHING CENTRE https://youtu.be/RIts1ayPMPo Percentage | प्रतिशत | Class – 5 | Parimal Sir | ICS COACHING CENTRE https://youtu.be/_KpdhyXOUzs Percentage | प्रतिशत | Class – 4… ## TRIGONOMETRY | त्रिकोणमिति | CLASS 2 | Parimal Sir | ICS COACHING CENTRE

TRIGONOMETRY | त्रिकोणमिति | CLASS 2 | Parimal Sir | ICS COACHING CENTRE ## Trigonometric Substitution

This calculus video tutorial provides a basic introduction into trigonometric substitution. It explains when to substitute x with sin, cos, or sec. It also explains how to perform a change of variables using u-substitution integration techniques and how to use right triangle trigonometry with sohcahtoa to convert back from angles in the form of theta… ## 3D Trigonometry

Corbettmaths – This video goes through a typical 3D trigonometry question – finding an angle in a cuboid.