Study Guides
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Trigonometric Values of Angles Study Guide
Trigonometric Values of Angles Some very interesting and important functions are formed by dividing the length of one side of a right triangle by the length of another side. These functions are called trigonometric because they come from the geometry of a ...
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Trigonometric Values of Angles Practice Questions
To review these concepts, go to Trigonometric Values of Angles Study Guide. Trigonometric Values of Angles Practice Questions Convert the following into radians. ...
Source: LearningExpress, LLC -
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Trigonometry and Triangles Study Guide
Trigonometry and Triangles This lesson examines triangles. We see why the angles of a triangle add up to 180° (or p radians). We also see how two triangles with the same three angles (similar triangles) will always be scaled or enlarged ...
Source: LearningExpress, LLC -
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The Pythagorean Theorem Study Guide
The Pythagorean Theorem In this lesson, we examine a very powerful relationship between the three lengths of a right triangle. With this relationship, we will find the exact length of any side of a right triangle, provided we know the lengths of ...
Source: LearningExpress, LLC -
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Isosceles and Equilateral Triangles Study Guide
Isosceles and Equilateral Triangles In this lesson, we study two special right triangles for which we are able to know both the angle measures and the trigonometric values. The first triangle is the isosceles right triangle, with two 45° ...
Source: LearningExpress, LLC -
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Finding Length in Trigonometry Study Guide
Finding Length in Trigonometry In this lesson, we use the basic trigonometric functions to solve word problems. In these problems, we use an angle and a distance to find the other distances around a right triangle. It is fortunate ...
Source: LearningExpress, LLC -
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Finding Angles in Right Triangles Study Guide
Finding Angles in Right Triangles In this lesson, we explore a variety of word problems in which we must calculate the measure of an angle from a right triangle. With inverse trigonometric functions sin–1, cos–1, ...
Source: LearningExpress, LLC -
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The Law of Sines Study Guide
The Law of Sines In this lesson, we prove a powerful theorem called the Law of Sines. This enables us to find the angles and sides of non-right triangles. With the trigonometric functions, we can measure the sides and angles of right triangles. To ...
Source: LearningExpress, LLC -
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The Law of Cosines Study Guide
The Law of Cosines When we know the angles of a triangle and one of the sides, we can figure out the lengths of the other sides with the Law of Sines. In this lesson, we see how a new theorem, the Law of Cosines, enables us to ...
Source: LearningExpress, LLC -
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Heron's Formula Study Guide
Heron's Formula Heron's formula enables us to calculate the area of a non-right triangle, just by knowing the lengths of the three sides. We prove the formula in this lesson and show how it can be used to find the areas of triangles and ...
Source: LearningExpress, LLC
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