 | Daniel Alexander Murray - Plane trigonometry - 1911 - 158 pages
...c, can be derived in like manner, or can be obtained from (1) by symmetry, viz. : In words: In any triangle, the square of any side is equal to the sum of the squares of the other two sides minus twice the product of these two sides multiplied by the cosine... | |
 | Alfred Monroe Kenyon, Louis Ingold - Trigonometry - 1913 - 184 pages
...the case considered above. This result, called the law of cosines, may be stated as follows : In any triangle, the square of any side is equal to the sum of the squares of the other two sides minus twice their product into the cosine of their included angle. Example... | |
 | John Wesley Young, Albert John Schwartz - Geometry, Modern - 1915 - 248 pages
...B = 46°, 36'. Ans. C = 123° 12', 6 = 205.1, c = 236.4. 202 OBLIQUE TRIANGLES 463. THEOREM. In any triangle the square of any side is equal to the sum of the squares of the other two sides minus twice the product of these sides and the cosine of the included... | |
 | Mathematics - 1917 - 284 pages
...solved by aid of the following theorem, which is known as the Cosine Law. 186a. Theorem: In any oblique triangle the square of any side is equal to the sum of the squares of the other two sides minus twice their product times the cosine of their included angle.... | |
 | Alfred Monroe Kenyon, William Vernon Lovitt - Mathematics - 1917 - 368 pages
...head, since we may find the third angle which lies opposite the given side. 100. Law of Cosines. In any triangle, the square of any side is equal to the sum of the squares of the other two sides minus twice the product of these two sides into the cosine of their... | |
 | Leonard Magruder Passano - Trigonometry - 1918 - 176 pages
...8.8691 a = .07398 56. The Law of Cosines. Case IV may be solved by means of the following theorem : In a triangle the square of any side is equal to the sum of the squares of the other two sides minus twice the product of those sides by the cosine of their included... | |
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In any triangle the square of any side is equal to the sum of the squares of the other two sides minus twice the product of these two sides and the cosine of their included angle. 
