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2. Exact trigonometric values - Wikipedia

   en.wikipedia.org/wiki/Exact_trigonometric_values

   The trigonometric functions of angles that are multiples of 15°, 18°, or 22.5° have simple algebraic values. These values are listed in the following table for angles from 0° to 45°. [1]

3. List of trigonometric identities - Wikipedia

   en.wikipedia.org/wiki/List_of_trigonometric...

   In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles .

4. Sine and cosine - Wikipedia

   en.wikipedia.org/wiki/Sine_and_cosine

   In mathematics, sine and cosine are trigonometric functions of an angle.The sine and cosine of an acute angle are defined in the context of a right triangle: for the specified angle, its sine is the ratio of the length of the side that is opposite that angle to the length of the longest side of the triangle (the hypotenuse), and the cosine is the ratio of the length of the adjacent leg to that ...

5. Outline of trigonometry - Wikipedia

   en.wikipedia.org/wiki/Outline_of_trigonometry

   The following outline is provided as an overview of and topical guide to trigonometry: Trigonometry – branch of mathematics that studies the relationships between the sides and the angles in triangles. Trigonometry defines the trigonometric functions, which describe those relationships and have applicability to cyclical phenomena, such as waves.

6. American Airlines suspends flights to Haiti indefinitely - AOL

   www.aol.com/american-airlines-suspends-flights...

   American Airlines is no longer resuming its daily service out of Miami into Port-au-Prince's Toussaint Louverture International Airport.

7. Proofs of trigonometric identities - Wikipedia

   en.wikipedia.org/wiki/Proofs_of_trigonometric...

   Identity 1: ⁡ + ⁡ = The following two results follow from this and the ratio identities. To obtain the first, divide both sides of ⁡ + ⁡ = by ⁡; for the second, divide by ⁡.

8. Egg prices are going even higher. This time it’s avian flu ...

   www.aol.com/egg-prices-going-even-higher...

   “I can’t go over $4.99 (a dozen) on the eggs right now, even though our farmer may say he’s raising the price 10 cents,” said Leonard Jr. “I’ve found overall it’s a challenging year ...

9. 4 predictions for the US housing market in 2025, according to ...

   www.aol.com/4-predictions-us-housing-market...

   Zillow predicts the US housing market will keep shifting in 2025.. The real-estate firm says the average home value rose by 2.6% annually in October. It says homebuying activity should pick up ...