In this lesson we show you how to construct the unit circle and the right angle triangle within using Geogebra which is important in future periodic function lessons.
In this video you will learn what radians are, and how to convert between degrees and radians.
Did you get a question where you have to find the hypotenuse of a triangle contained across the diagonal of a rectangular prism? Here is how you do it.
A modelling and problem solving question that involves the use of bearings, cosine rule, sine rule, and a bit of parallel lines geometry (alternate angles, cointerior angles etc).
This practice question requires knowledge in algebraic manipulation, trigonometry (especially the cosine rule), as well as bearings. Do not attempt this question until you are confident with the above concepts.
This tutorial teaches you how to use the cosine rule to find unknown angles and sides when 2 sides and the angle in between is given (where sine rule cannot be used).
Traditionally the area of a triangle is found using the perpendicular height. In this tutorial, you learn how to find the area of a triangle using 2 side lenghths and the angle in between, through the use of the sine ratio / rule.
In this lesson you learn the proof of sine rule, and how to use it to find unknown sides / angles in a non-right angled triangle, when at least 1 pair of opposite sides/angles are given.
In this tutorial, you learn how to find an unknown side in a right angle triangle, given the angle and one side, using the trigonometric equations and the calculator.