Brian McLogan
How to use the half angle of cosine when given a triangle
👉 Learn how to evaluate the tangent of a half-angle. When given the value of the tangent of an angle, we can evaluate the tangent of half the angle using the tangent half-angle formula. When the value of any other trigonometric function...
Brian McLogan
Evaluate the double angle of cosine from a triangle
👉 Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value of the sine of the angle. The value of the sine of double a given angle is obtained using the formula sin(2u)...
Curated Video
Finding the Perimeter of Two-Dimensional Figures on the Coordinate Plane
In this video, the teacher explains how to find the perimeter of two-dimensional figures on the coordinate plane. They review the Pythagorean theorem and emphasize the importance of adding all the sides together to find the perimeter of...
Brian McLogan
Double and Half Angle Formulas | Analytic Trig | Pre-Calculus
In this video we will explore how to use the double angle to evaluate trigonometric expressions from triangles as well as angles in degrees and radians. We will then use double angle formulas to help verify trigonometric identities and...
Brian McLogan
How to Use Inverse Trigonometric Functions to Find the Angle of a Triangle
👉 Learn how to evaluate inverse trigonometric functions. When an angle is unknown but the value of one of the trigonometric functions of the angle is known, we can evaluate the value of the angle using the inverse trigonometric function...
Brian McLogan
How to determine points on a unit circle with special triangles
👉 Learn about the points on the unit circle. A unit circle is a circle which radius is 1 and is centered at the origin in the cartesian coordinate system. To construct the unit circle we take note of the points where the unit circle...
Brian McLogan
Understand the different ways we understand the sine function
👉 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...
Brian McLogan
Master How to find the area and perimeter of a triangle given three points
Master How to find the area and perimeter of a triangle given three points
Brian McLogan
Word Problems with trigonometry and triangles
👉 Learn how to solve the word problems with trigonometry. Word problems involving angles, including but not limited to: bearings, angle of elevations and depressions, triangles problems etc are solved using trigonometry. To be able to...
Brian McLogan
Where do the pythagorean theorems come from
👉 Learn all about the different trigonometric identities and how they can be used to evaluate, verify, simplify and solve trigonometric equations. The identities discussed in this playlist will involve the quotient, reciprocal,...
Brian McLogan
Find the perimeter of a triangle on a coordinate plane | Geometry
👉In this video I will show you how to find the perimeter of a triangle using the distance formula given three points on a coordinate plane.
Catalyst University
Geometry | The Super-Pythagorean Theorem [Diagonal of a Prism]
In this video, we calculate the length of the diagonal in a rectangular prism using the Super-Pythagorean Theorem [with example].
Brian McLogan
Area and Perimeter of Triangle in Coordinate Plane
Timestamps: 0:00 Intro 2:46 Find the Perimeter 6:10 Find the Area Corrections: 4:02 Coordinate Point should be (2,3) Answer is correct as graphed 4:48 Coordinate Point should be (2,3) Answer is correct as graphed
Brian McLogan
Given a line tangent to a circle find the value of x
Learn how to solve problems with tangent line. A tangent line to a circle is a line that touches the circle at exactly one point. The tangent line to a circle makes a right angle with the radius of the circle at the point of its...
Brian McLogan
Use two triangles to evaluate the tangent sum formula
👉 Learn how to evaluate the secant of the sum or difference of two angles using the sum/difference formulas. To do this, we first use the Pythagoras theorem to obtain all the sides of the right triangle in the unit circle. Recall that...
Brian McLogan
Determine the sides of a triangle produce an acute, obtuse or right triangle
Learn about the Pythagorean theorem. The Pythagoras theorem is a fundamental relation among the three sides of a right triangle. It is used to determine the missing length of a right triangle. The Pythagoras theorem states that the...
Brian McLogan
Finding the height of a rhombus using pythagorean theorem
Learn about the Pythagorean theorem. The Pythagoras theorem is a fundamental relation among the three sides of a right triangle. It is used to determine the missing length of a right triangle. The Pythagoras theorem states that the...
Curated Video
Using the Pythagorean Theorem with a Rectangle
In this short math video we will answer a standardized math test question where we are asked to find the length of the diagonal of a rectangle. We will review that the four angles of any rectangle are 90 degrees. So, the diagonal forms a...
Brian McLogan
Trigonometry | Preparing for Precalculus Part 6
Trigonometry | Preparing for Precalculus Part 6
Brian McLogan
Sketch a triangle given a trig angle then determine remaining trig functions of angle
👉 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 cosines to a triangle to find the missing length
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
The Pythagorean Theorem: See a Proof and Learn How to Use the Theorem
During this video lesson, students will be introduced to the Pythagorean Theorem which is read a squared plus b squared equals c squared. Students will learn key vocabulary and how to identify the legs and hypotenuse of a right triangle....
Brian McLogan
Writing a proof for equiangular angles within each other
👉 Learn how to write a proof given a triangle. A triangle is a polygon with three sides. A proof is a series of statements and reasons that establishes the truth of a mathematical claim(statement). To write a proof given a triangle, we...