NEB Grade 12 | Trigonometry | Properties of Triangle | New Course Basic Mathematics Exercise Part 2

[@deepakbohora1105]

Babal xa tw bujaune technique ❤ani all concept clear vayo .
So thank you so much dai !!❤❤

[@mrrmaths]

0:00-2:41 In any triangle, prove that:
(b+c)cosA+(c+a)cosB+(a+b)cosC=a+b+c
2:41-5:36 In any triangle, prove that:
b^2 sin2C+c^2 sin2B=2absinC
5:36-10:03 In any triangle, prove that:
c^2 cos^2 B+b^2 cos^2 C+bccos(B−C)=(a^2+b^2+c^2)/2
10:03-10:58 In any triangle, prove that:
(c−bcosA)/(b−ccosA)=cosB/cosC
10:58-12:03 In any triangle, prove that:
(a−bcosC)/(c−bcosA)=sinC/sinA
12:03-15:44 In any triangle, prove that:
a^3 sin⁡(B−C)+b^3 sin⁡(C−A)"+" c^2 sin⁡(A−B)"=0"
15:44-19:56 In any triangle, prove that:
(b^2−c^2)/a^2 sin2A+(c^2−a^2)/b^2 sin2B+(a^2−b^2)/c^2 sin2C=0
19:56-22:21 In any triangle, prove that:
sin⁡(A+B):sin⁡(A−B)=c^2:a^2−b^2
22:21-25:03 In any triangle, prove that:
(a^2−b^2+c^2 )tanB=(a^2+b^2−c^2 )tanC=(b^2+c^2−a^2 )tanA
25:03-27:48 In any triangle, prove that:
(cosB−cosC)/(cosA+1)=(c−b)/a
27:48-34:03 In any triangle, prove that:
(asinA+bsinB+csinC)/(acosA+bcosB+ccosC)=R/abc (a^2+b^2+c^2 )
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[@AshimxDhungana]

Herda buje jhai hunxa dai related qn Aaye garna sakidaina 😭🤝

[@pujanrai2324]

Fast next videos sir❤

[@mrrmaths]

Next part ahilei aaucha :)

[@kritagyakh9949]

Dai aba solution of triangle pani.