Curated Video
Finding Acute Angle Measures in Right Triangles Using Inverse Cosine
This video explains how to find the measure of an acute angle in a right triangle when only the side lengths are known. It introduces the concept of inverse trigonometric functions, specifically the inverse cosine function, to determine...
Curated Video
Finding Acute Angles in Right Triangles Using Inverse Tangent Function
In this video, the teacher explains how to find the measure of an acute angle in a right triangle when only the side lengths are known. They introduce the concept of trigonometric ratios (sine, cosine, and tangent) and explain how to use...
Curated Video
Finding Acute Angle Measures in Right Triangles using Inverse Sine Function
In this video, you will learn how to find the measure of an acute angle in a right triangle using the inverse sine function. The video explains the ratios of side lengths for the trigonometric functions and introduces the concept of...
Curated Video
How to Find the Angle of a Quadrilateral with an Acute Angle
This video shows the process for solving the problem presented in IGCSE A June 2018 paper 1HR Q18, which involves finding the angle of a quadrilateral with an acute angle. By the end of the video, learners will understand the properties...
Brian McLogan
How to apply the law of cosines with no angles given
Learn how to solve for the lengths of the sides and the measures of the angles of a triangle using the law of cosines. The law of cosines is used in determining the lengths of the sides or the measures of the angles of a triangle when no...
Curated Video
Finding the Tangent of an Acute Angle in a Right Triangle
In this video, the teacher explains how to use the tangent ratio to find the height of a flying plane. By setting up an equation using the tangent of the given angle and the known distance, the teacher demonstrates how to solve for the...
Curated Video
Understanding Cosine Values in Right Triangles
This video explains how to find the cosine value of an acute angle in a right triangle. It demonstrates how the ratios of the adjacent leg to the hypotenuse determine the cosine value of a specific angle. The video also highlights that...
Brian McLogan
How to find the angle between two vectors
Learn how to determine the angle between two vectors. To determine the angle between two vectors you will need to know how to find the magnitude, dot product and inverse cosine. Then, the angle between two vectors is given by the inverse...
Brian McLogan
Evaluate for sine cosine and tangent using reference angles
👉 Learn how to evaluate trigonometric functions of a given angle. Given an angle greater than 2pi in radians, to evaluate the trigonometric functions of the given angle, we first determine the smallest positive coterminal angle of the...
Brian McLogan
Evaluate for sine cosine and tangent using reference angles
👉 Learn how to find the reference angle of a given angle. The reference angle is the acute angle formed by the terminal side of an angle and the x-axis. To find the reference angle, we determine the quadrant on which the given angle lies...
Brian McLogan
Evaluate for sine cosine and tangent using reference angles
👉 Learn how to find the reference angle of a given angle. The reference angle is the acute angle formed by the terminal side of an angle and the x-axis. To find the reference angle, we determine the quadrant on which the given angle lies...
Brian McLogan
How to find all of the missing parts of a triangle by first using the law of cosines
Learn how to solve for the lengths of the sides and the measures of the angles of a triangle using the law of cosines. The law of cosines is used in determining the lengths of the sides or the measures of the angles of a triangle when no...
Brian McLogan
How to use law of cosines to find the missing angles of a triangle given SSS
Learn how to solve for the lengths of the sides and the measures of the angles of a triangle using the law of cosines. The law of cosines is used in determining the lengths of the sides or the measures of the angles of a triangle when no...
Brian McLogan
How to use the law of cosines to find the missing parts of a triangle
Learn how to solve for the lengths of the sides and the measures of the angles of a triangle using the law of cosines. The law of cosines is used in determining the lengths of the sides or the measures of the angles of a triangle when no...
Curated Video
Crocodilian Interaction with Ancient and Modern Humans
This video explores the fascinating history and mythology surrounding crocodilians, shedding light on their cultural significance and the misconceptions that have surrounded them. It also delves into the threats they face today,...
Brian McLogan
Find all the missing measures SAS | Law of Cosines
Find all the missing measures SAS | Law of Cosines
Brian McLogan
Learn how to evaluate for an angle by sketching the angle and using reference angles
👉 Learn how to evaluate the six trigonometric functions of a given angle. When given an angle we locate the angle on the unit circle. Then using the coordinate of the terminal side of the angle on the unit circle and the definitions of...
Brian McLogan
How to evaluate the inverse of cosine with a calculator
👉 Learn how to evaluate inverse trigonometric functions. The inverse trigonometric functions are used to obtain theta, the angle which yielded the trigonometric function value. It is usually helpful to use the calculator to calculate the...
Curated Video
Using the Cosine Ratio in Right Triangles
In this video, the teacher explains how to use the cosine ratio to find the length of a ladder needed to climb to a roof at a specific angle. By comparing the ratios of the side adjacent to the angle and the hypotenuse in a right...
Brian McLogan
Learn how to find the six trig functions given a point and using reference angles
👉 Learn all about evaluating trigonometric functions with triangles. In this playlist, we will learn how to evaluate, sine, cosine, tangent, cotangent, secant, and cosecant when given the sides of a triangle. If we have missing sides we...
Curated Video
Trigonometry in the Coordinate Plane: Sine, Cosine, and Tangent
In this video, the teacher explains how to find the sine, cosine, and tangent of angles in the coordinate plane using right triangle geometry. The Pythagorean theorem and the acronym SOHCAHTOA are used to understand the relationships...
Brian McLogan
Find the reference angle and sketch both angles in standard position
👉 Learn how to sketch angles in terms of pi. An angle is the figure formed by two rays sharing the same endpoint. Angle is measured in radians or in degrees. One complete revolution about a point is equivalent to 2pi radians and 360...