right triangle definitions of sine and cosine 37 videos
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The Definitions of Sine and Cosine
Trigonometry Trigonometric Functions
How we define sine and cosine for all angle measures using the unit circle.
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Evaluating Sine and Cosine at Other Special Angles
Trigonometry Trigonometric Functions
How to measure the sine and cosine of 150.
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Evaluating Sine and Cosine at Special Acute Angles
Trigonometry Trigonometric Functions
How do we measure sine and cosine of pi/4?
sine cosine unit circle definitions of sine and cosine angles in standard position -
Trigonometric Ratios: Cosine
Trigonometry Basic Trigonometry
How to define the cosine ratio and identify the cosine of an angle in a right triangle.
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Trigonometric Ratios: Sine
Trigonometry Basic Trigonometry
How to define the sine ratio and identify the sine of an angle in a right triangle.
trigonometry ratio right triangle sine SOH CAH TOA -
Using Sine to Calculate the Area of a Triangle
Trigonometry Basic Trigonometry
How to calculate the area of any triangle using two sides and an included angle.
area of a triangle sine -
Using the Sine and Cosine Addition Formulas to Prove Identities
Trigonometry Advanced Trigonometry
How to use the sine and cosine addition formulas to prove the cofunction identities.
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The Law of Sines
Trigonometry Basic Trigonometry
How to define the law of sines.
law of sines ratios triangles -
The Law of Cosines
Trigonometry Basic Trigonometry
How to define and use the law of cosines.
law of cosines ratios triangles -
Find an Equation for the Sine or Cosine Wave
Trigonometry Trigonometric Functions
How to identify the graph of a stretched cosine curve.
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Inverse Trigonometric Functions
Trigonometry Basic Trigonometry
How to use inverse trig functions to find angles in right triangles.
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The Sine Addition Formulas
Trigonometry Advanced Trigonometry
How to derive the sine of a sum formula.
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Transforming the Graphs of Sine and Cosine
Trigonometry Trigonometric Functions
How the values of A and B affect the shape of the graph y = A sin(Bx).
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The Cosine Addition Formulas
Trigonometry Advanced Trigonometry
How to derive the cosine of a difference formula.
the unit circle the law of cosines the distance formula cosine of a difference formula -
More Transformations of Sine and Cosine
Trigonometry Trigonometric Functions
How the value of h affects the shape of the graph y = A sin(B(x-h)).
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30-60-90 Triangles
Trigonometry Pythagorean Theorem
How to find the legs and hypotenuse in 30-60-90 triangles when given: the short leg, the long leg, or the hypotenuse.
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Trigonometric Ratios: Tangent
Trigonometry Basic Trigonometry
How to define the tangent ratio and identify the tangent of an angle in a right triangle.
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45-45-90 Triangles
Trigonometry Pythagorean Theorem
How to find the length of a leg or hypotenuse in a 45-45-90 triangle using the Pythagorean Theorem.
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Converse of the Pythagorean Theorem
Trigonometry Pythagorean Theorem
How to use the converse of the Pythagorean Theorem to determine if a triangle is a right triangle, how to use Pythagorean triples to memorize the lengths of certain right triangles.
right triangle leg hypotenuse converse Pythagorean triples -
The Double-Angle Formulas
Trigonometry Advanced Trigonometry
How to use the sine and cosine addition formulas to prove the double-angle formulas.
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