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Curated Video
Trigonometry Basics: Using the Sine Rule for Non-Right Angle Triangles
The video is a lecture presentation on the sine rule, which is used to calculate missing side lengths and angles in non-right angle triangles. The presenter explains the three trigonometry ratios (sine Theta, Cos Theta, and tan Theta)...
Brian McLogan
Given an equation evaluate for the six trig functions using a right triangle
π Learn how to evaluate the six trigonometric functions given the value of one of the trigonometric functions. When given the value of one of the trigonometric functions of an angle, we can evaluate the values of the other trigonometric...
Brian McLogan
Applying the law of sines when no triangle exists
π Learn how to determine if a given SSA triangle has 1, 2 or no possible triangles. Given two adjacent side lengths and an angle opposite one of them (SSA or ASS), then there are 3 possible cases: there can be 1 solution, 2 solutions and...
Brian McLogan
How to determine if three lengths make up a triangle
π Learn how to classify triangles. A triangle is a polygon with three sides. Triangles are classified on the basis of its angles or on the basis of its side lengths. The classification of triangles on the bases of its angles are: acute,...
Brian McLogan
Pre-Calculus - Finding the missing sides of a 45 45 90 triangle using special relationships
π Learn about the special right triangles. A special right triangle is a right triangle having angles of 30, 60, 90, or 45, 45, 90. Knowledge of the ratio of the length of sides of a special right triangle enables us to solve for any...
Brian McLogan
How to use the law of sines for the ambiguous case with two triangles
π Learn how to determine if a given SSA triangle has 1, 2 or no possible triangles. Given two adjacent side lengths and an angle opposite one of them (SSA or ASS), then there are 3 possible cases: there can be 1 solution, 2 solutions,...
Brian McLogan
How to use the law of sines when given two angles and one side
π Learn how to solve for the length of the sides and the measures of the angles of a triangle using the law of sines. The law of sines is used in determining the length of the opposite side to a known angle measure or the measure of the...
Brian McLogan
Right Triangles | Trigonometry | Pre-Calculus
In this lesson I will show you how evaluate the six trigonometric functions with right triangles. We will begin by finding the missing side of a triangle with the pythagorean theorem and then transcend into identifying the sides of a...
Brian McLogan
Determining if Two Triangles are Congruent by Plotting Points
π Learn how to show whether two triangles are congruent from the coordinate (x-y) plane. Two or more triangles are said to be congruent if they have the same shape and size. To show whether two triangles whose points on the coordinate...
Brian McLogan
Apply the law of sines when you are given AAS
π Learn how to solve for the length of the sides and the measures of the angles of a triangle using the law of sines. The law of sines is used in determining the length of the opposite side to a known angle measure or the measure of the...
Brian McLogan
Master Solving for the missing parts of a triangle using the law of cosines SAS
Master Solving for the missing parts of a triangle using the law of cosines SAS
Curated Video
How to Find the Volume of a Composite Figure
In this short video we will answer a standardized math test question where we are asked to find the volume of a composite figure. We will review that a composite figure is a solid made up of two or more three dimensional figures. We...
Brian McLogan
Learn how to visualize factoring
πLearn the basics of factoring quadratics by using different techniques. Some of the techniques used in factoring quadratics include: when the coefficient of the squared term is not 1. In that case, we first write the quadratic in...
Brian McLogan
Master Evaluating the double angle for Sine, Cosine and Tangent from a right triangle
Master Evaluating the double angle for Sine, Cosine and Tangent from a right triangle
Brian McLogan
Showing two triangles are similar when they overlay each other using SAS
π Learn how to solve for the unknown in a triangle divided internally such that the division is parallel to one of the sides of the triangle. The triangle proportionality theorem states that if a line is parallel to one side of a...
Brian McLogan
When given one obtuse angle use the law of sines to determine the missing measurements Ambiguous One
π Learn how to determine if a given SSA triangle has 1, 2 or no possible triangles. Given two adjacent side lengths and an angle opposite one of them (SSA or ASS), then there are 3 possible cases: there can be 1 solution, 2 solutions,...
Brian McLogan
How to use the law of sines when you have no solutions
π Learn how to determine if a given SSA triangle has 1, 2 or no possible triangles. Given two adjacent side lengths and an angle opposite one of them (SSA or ASS), then there are 3 possible cases: there can be 1 solution, 2 solutions and...
Brian McLogan
How to find the missing parts of a triangle using law of sines
π Learn how to solve for the length of the sides and the measures of the angles of a triangle using the law of sines. The law of sines is used in determining the length of the opposite side to a known angle measure or the measure of the...
Brian McLogan
Find the missing measure of a triangle given AAS Law of Sines
π Learn how to solve for the length of the sides and the measures of the angles of a triangle using the law of sines. The law of sines is used in determining the length of the opposite side to a known angle measure or the measure of the...
Brian McLogan
One, Two, Or No Triangles (How Can You Tell)
The ambiguous case can be very confusing on how to determine 1, 2 or no triangles and how it can make sense. In this video I try to give you visual pointers as well as some formulas to help you remember what case you have. Hope it helps.
Curated Video
Solve Problems with Inverse of Squares and Square Roots
This video explains the inverse relationship between squares and square roots. It demonstrates how to find the square root of a number and how to square a number using examples. The lesson emphasizes that squares and square roots are...
Brian McLogan
Find the missing sides of a triangle using the law of sines
π Learn how to solve for the length of the sides and the measures of the angles of a triangle using the law of sines. The law of sines is used in determining the length of the opposite side to a known angle measure or the measure of the...