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1. math.libretexts.org › Bookshelves › Applied_Mathematics10.9: Right Triangle Trigonometry - Mathematics LibreTexts

   math.libretexts.org › Bookshelves › Applied_Mathematics

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   Trigonometry is about the relationships (or ratios) of angle measurements to side lengths in primarily right triangles. However, trigonometry is useful in calculating missing side lengths and angles in other triangles and many applications.

2. math.libretexts.org › Courses › Reedley_College1.2: Right Triangle Trigonometry - Mathematics LibreTexts

   math.libretexts.org › Courses › Reedley_College

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   Define the six trigonometric functions in terms of \ (x,y,r\) (rectangular coordinates) and language associated with right triangles. Find function values for 30° (\ (\dfrac {\pi} {6}\)),45° (\ (\dfrac {\pi} {4}\)),and 60° (\ (\dfrac {\pi} {3}\)). Use equal cofunctions of complementary angles.

3. www.mathsisfun.com › sine-cosine-tangentSine, Cosine and Tangent - Math is Fun

   www.mathsisfun.com › sine-cosine-tangent

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   Right Triangle. Sine, Cosine and Tangent are the main functions used in Trigonometry and are based on a Right-Angled Triangle. Before getting stuck into the functions, it helps to give a name to each side of a right triangle: "Opposite" is opposite to the angle θ. "Adjacent" is adjacent to (next to) the angle θ. "Hypotenuse" is the long one.

4. math.libretexts.org › Bookshelves › Precalculus5.5: Right Triangle Trigonometry - Mathematics LibreTexts

   math.libretexts.org › Bookshelves › Precalculus

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   Given the side lengths of a right triangle, evaluate the six trigonometric functions of one of the acute angles. If needed, draw the right triangle and label the angle provided. Identify the angle, the adjacent side, the side opposite the angle, and the hypotenuse of the right triangle.

5. openstax.org › books › contemporary-mathematics10.8 Right Triangle Trigonometry - Contemporary Mathematics -...

   openstax.org › books › contemporary-mathematics

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   Introduction. 2.1Statements and Quantifiers. 2.2Compound Statements. 2.3Constructing Truth Tables. 2.4Truth Tables for the Conditional and Biconditional. 2.5Equivalent Statements. 2.6De Morgan’s Laws. 2.7Logical Arguments. Chapter Summary. Key Terms. Key Concepts. Videos. Projects.

6. www.khanacademy.org › math › trigonometryKhan Academy

   www.khanacademy.org › math › trigonometry

   Learn about the properties and applications of right triangles and trigonometry with Khan Academy's comprehensive unit.

7. www.khanacademy.org › math › geometryRight triangles & trigonometry - Khan Academy

   www.khanacademy.org › math › geometry

   Triangles are not always right (although they are never wrong), but when they are it opens up an exciting world of possibilities. Not only are right triangles cool in their own right (pun intended), they are the basis of very important ideas in analytic geometry (the distance between two points in space) and trigonometry.