NEB Grade 12 | Trigonometry | Properties of Triangle | New Course Basic Mathematics Exercise Part 1
Автор: MRR Maths
Загружено: 2024-04-18
Просмотров: 3193
Описание:
0:00-2:14 In any triangle, prove that: a(bcosC−cCosB)=b^2−c^2
2:14-4:55 In any triangle, prove that:cosA/a+a/bc=cosB/b+b/ca=cosC/c+c/ab
4:55-6:53 In any triangle, prove that:cosA/a+cosB/b+cosC/c=(a^2+b^2+c^2)/2abc
6:53-9:46 In any triangle, prove that:
a^3 (sin^3 B−sin^3 C)+b^3 (sin^3 C−sin^3 A)+c^3 (sin^3 A−sin^3 B)=0
9:46-16:05 In any triangle, prove that:
(asin(B−C))/(b^2−c^2 )=(bsin(C−A))/(c^2−a^2 )=(csin(A−B))/(a^2−b^2 )
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