Trigonometry is an easy way to work out the unknown sides and angles of a right angled triangle. The trick - know the side names - the opposite, hypotenuse, and adjacent, and know how and when to apply the trigonomic functions - sin, cos and tan. This is the only trick to getting it right every time!
In this lesson, students learn work out unknown side lengths using use sine, cosine, and tangent. You will need a scientific calculator for the problems in this lesson - and I'll show you how to access one on your computer.

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How Many Faces, Edges And Vertices Does A Octagonal Prism Have?
Here we’ll look at how to work out the faces, edges of vertices of an octagonal prism.
We’ll start by counting the faces, these are the flat surfaces that make the 3D shape. An octagonal prism has 10 faces altogether - 2 octagonal faces, as well as 8 rectangular faces.
Next we’ll work out how many edges the shape has, which are where two faces meet. An octagonal prism has 24 edges.
Next we’ll count the corners of the shape(the corners). Get counting! An octagonal prism has 160 vertices.

For the full playlist for the faces, edges and Vertices of a whole lot of 3D shapes go to https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

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Calculate the cube of any number between 1 and 100 fast

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Surface Area Half Cylinders To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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Surds / Radicals - the basics made easy. Maths is radical (bad pun). To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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How to work out the area of a rectangle in square feet and square inches.


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In this math algebra trick we will look at how to directly divide big polynomial expressions. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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The nine times table is one of the easiest times tables - if you know these tricks! Make maths multiplication easy! This video is epsecially for people learning thenine times table!

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How to calculate surface area of a cylinder.
The surface area of a cylinder is easy to work out. In this video we will look at how to do it quickly and accurately.

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Basic working out of wages involving flat rates of pay, and overtime.
Also shown is how to fill in a timesheet, and work out pay from a timesheet. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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How to work out IV rates. This part of a series looking at math calculations used by nurses. T

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This math lesson looks at pythagorean math - how to work out the unknown sides of right angles triangle. The 3,4,5 triangle will also be explored. Become a math genius! To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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This tutorial looks at how to quickly and easily do long division using Vedic Math.
Learn to calculate long division as quickly as a calculator, without needing the guesswork often assosiated with standard long division.
This video is the last of four videos looking at this ingenious method. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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This Mental Math Trick is the secret to doubling numbers instantly. With this trick you will be able to throw away the calculator (OK that is an exaggeration!)!

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#mathtrick
#basicmath
#multiplication

Basics of adding fractions - including simple fractions with the same demoninator, fractions with different denominators and mixed numbers.
You will learn how to add or subtract fractions using the lowest common denominator - where basically you work to get the bottom number - the denominator the same.
From this we will look at adding mixed numbers.

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How to instantly add large sets of three digit numbers mentally.
Using this mental math method you will be able to add any number of three digit numbers with each other - faster than a calculator! Become a math genius in no time using this trick! T

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Dividing into a given ratio

This video is part of a playlist:
https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

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#fractions
#fraction
#fractionsmath

Direct division of Polynomials To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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Being able to subtract using zero is an important skill - and using vedic math it has never been as easy. Calculate your change quickly in maths calculations involving money. To do this you can subtract with zeros, or even faster using this counting up technique, as taught in vedic maths.
This is another in the series of how to do fast maths.

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This video looks at how the video on multiplying two digit numbers rapidly works, as well as looking at where common mistakes are made. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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