Arc Length and Area of a Sector of a Circle

Bearing

Cofunction Calculator

Complementary and Supplementary Angles

Decimal Degree Minutes Seconds

Prefix Multipliers

Pythagorean Theorem

Pythagorean Theorem Trig Proofs

Reference Angle

Sum to Product and Product to Sum Formulas

Triangle Solver and Classify Triangles

Trig Angle conversions

Trig Measurement

Trigonometry Relations

Unit Circle

What is a Unit Circle

Calculates the arc length of a circle and the area of the sector of a circle

Calculator · Watch the VideoBearing

Takes a bearing and lists the steps needed to get from Point A to Point B using that bearing.

CalculatorCofunction Calculator

Calculates the cofunction of the 6 trig functions:
* sin

* cos

* tan

* csc

* sec

* cot

Calculator · Watch the Video* cos

* tan

* csc

* sec

* cot

Complementary and Supplementary Angles

This calculator determines the complementary and supplementary angle of a given angle that you enter OR it checks to see if two angles that you enter are complementary or supplementary.

Calculator · Watch the VideoDecimal Degree Minutes Seconds

Convertes decimal degrees to degrees, minutes, seconds or degrees, minutes seconds, to decimal degrees

CalculatorPrefix Multipliers

Shows a table of prefix multipliers, designators, symbols, and values

Lesson · Watch the VideoPythagorean Theorem

Figures out based on user entry the missing side or missing hypotenuse of a right triangle. In addition, the calculator shows the proof of the Pythagorean Theorem and then determines by numerical evaluation if the 2 sides and hypotenuse you entered are a right triangle using the Pythagorean Theorem

Calculator · Watch the VideoPythagorean Theorem Trig Proofs

Shows the proof of 3 pythagorean theorem related identities using the angle θ:

Sin^{2}(θ) + Cos^{2}(θ) = 1

Tan^{2}(θ) + 1 = Sec^{2}(θ)

Sin(θ)/Cos(θ) = Tan(θ)

CalculatorSin

Tan

Sin(θ)/Cos(θ) = Tan(θ)

Reference Angle

Calculates the reference angle for a given angle. Also known as the positive acute angle.

Calculator · Watch the VideoSum to Product and Product to Sum Formulas

Given two angles in degrees of u and v, this determines the following:

* Sin(u) ± Sin(v)

* Cos(u) ± Cos(v)

* Sin(u)Sin(v)

* Cos(u)Cos(v)

* Sin(u)Cos(v)

* Cos(u)Sin(v)

* Sin(u + v)

* Sin(u - v)

* Cos(u + v)

* Cos(u - v)

* Tan(u + v)

* Tan(u - v)

Calculator* Sin(u) ± Sin(v)

* Cos(u) ± Cos(v)

* Sin(u)Sin(v)

* Cos(u)Cos(v)

* Sin(u)Cos(v)

* Cos(u)Sin(v)

* Sin(u + v)

* Sin(u - v)

* Cos(u + v)

* Cos(u - v)

* Tan(u + v)

* Tan(u - v)

Triangle Solver and Classify Triangles

Solves a triangle including area using the following solving methods

Side-Angle-Side (SAS) Side Angle Side

Angle-Side-Angle (ASA) Angle Side Angle

Side-Side-Angle (SSA) Side Angle Side

Side-Side-Side (SSS) Side Side Side

Area (A) is solved using Herons Formula

Law of Sines

Law of Cosines

Also classifies triangles based on sides and angles entered.

CalculatorSide-Angle-Side (SAS) Side Angle Side

Angle-Side-Angle (ASA) Angle Side Angle

Side-Side-Angle (SSA) Side Angle Side

Side-Side-Side (SSS) Side Side Side

Area (A) is solved using Herons Formula

Law of Sines

Law of Cosines

Also classifies triangles based on sides and angles entered.

Trig Angle conversions

Converts between degrees, radians, gradians, revolutions, and quadrants.

Calculator · Watch the VideoTrig Measurement

Given an angle θ, this calculates the following measurements:

Sin(θ) = Sine

Cos(θ) = Cosine

Tan(θ) = Tangent

Csc(θ) = Cosecant

Sec(θ) = Secant

Cot(θ) = Cotangent

Arcsin(x) = θ = Arcsine

Arccos(x) = θ = Arccosine

Arctan(x) =θ = Arctangent

Also converts between Degrees and Radians and Gradians

Coterminal Angles as well as determine if it is acute, obtuse, or right angle. For acute angles, a cofunction will be determined. Also shows the trigonometry function unit circle

Calculator · Watch the VideoSin(θ) = Sine

Cos(θ) = Cosine

Tan(θ) = Tangent

Csc(θ) = Cosecant

Sec(θ) = Secant

Cot(θ) = Cotangent

Arcsin(x) = θ = Arcsine

Arccos(x) = θ = Arccosine

Arctan(x) =θ = Arctangent

Also converts between Degrees and Radians and Gradians

Coterminal Angles as well as determine if it is acute, obtuse, or right angle. For acute angles, a cofunction will be determined. Also shows the trigonometry function unit circle

Trigonometry Relations

Calculates various trigonometry measurements (sin,cos,tan,csc,sec,cot) given other measurements that you enter.

Calculator · Watch the VideoUnit Circle

Determines if coordinates for a unit circle are valid, or calculates a variable for unit circle coordinates

Calculator · Watch the VideoWhat is a Unit Circle

This lesson walks you through what a unit circle is and how to use it

Lesson · Watch the Video