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Trigonometry

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Math Review of Trigonometric Identities
Math Review of Trigonometric Identities 150 150 Deborah

Overview Trigonometric identities are relationships between trigonometric ratios that define them in terms of one another. They can be used to help solve problems that involve trigonometric functions. Reciprocal Identities…

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Trigonometry Review of Right Triangles
Trigonometry Review of Right Triangles 150 150 Deborah

Overview Right triangles have special properties that are important to determine trigonometric ratios, such as sine (sin), cosine (cos), tangent (tan), secant (sec), cosecant (csc), and cotangent (cot). Those ratios…

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Math Review of the Law of Cosines
Math Review of the Law of Cosines 150 150 Deborah

Overview The Law of Cosines is true because of properties of any triangle, not just right triangles. In fact, the Pythagorean Theorem is a special case of the Law of…

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Math Review of the Law of Sines
Math Review of the Law of Sines 150 150 Deborah

Overview Some of the properties of a triangle hold true even if it is an oblique triangle, when none of the angles are right angles. We can solve the sides and…

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Math Review of Circular Functions
Math Review of Circular Functions 150 150 Deborah

Overview The trigonometric functions can also be defined in terms of the unit circle, so sometimes they are called the circular functions. This is because of the relationships of the…

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Math Review of Arcs and the Unit Circle
Math Review of Arcs and the Unit Circle 150 150 Deborah

Overview One of the methods of measuring angles is to measure them in relationship to a unit circle and as the measurement of an arc. Applications include periodic behavior such as…

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Math Review of More Fun with Tau
Math Review of More Fun with Tau 150 150 Deborah

Overview The quantity represented by the Greek letter tau (6.283185…) is the proportion of the circumference of a circle to its radius. The use of tau simplifies the relationships between angles…

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Math Review of Pi and Tau
Math Review of Pi and Tau 150 150 Deborah

Overview The number represented by the Greek letter pi (3.14159…) is one of the most famous irrational numbers in mathematics. It is the ratio of the circumference of a circle…

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Math Review of the Tangent of an Angle
Math Review of the Tangent of an Angle 150 150 Deborah

Overview The tangent of an angle is a ratio of the length of a leg opposite an acute angle to the length of a leg adjacent to the acute angle…

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Radian Measure
Radian Measure 150 150 Deborah

Overview:  What Is Radian Measure? The radian measure is another unit of angle measurement.  An angle has the measurement of one radian if the length of the arc it intercepts…

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