#themathsgurudev, Prove that :a(cosC-cosB)=2(b-c)cos^2 A/2, CLASS 11th MATHEMATICS, NCERT

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#themathsgurudev, Prove that :a(cosC-cosB)=2(b-c)cos^2 A/2, CLASS 11th MATHEMATICS, NCERT
  1. GURUDEV CLASSES
  2. #themathsgurudev
  3. Prove that :a(cosC-cosB)=2(b-c)cos^2 A/2
  4. CLASS 11th MATHEMATICS
  5. NCERT
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#themathsgurudev, Prove that 0:03:57

#themathsgurudev, Prove that :a(cosC-cosB)=2(b-c)cos^2 A/2, CLASS 11th MATHEMATICS, NCERT

In `triangle ABC`, 0:07:14

In `triangle ABC`, prove that `a(cosC-cosB)=2(b-c)cos^2.(A)/(2)` .

Prove that:- a(cosC 0:09:02

Prove that:- a(cosC - cosB) = 2(b - c) cos²A/2

`a(cosC-cosB)=2(b-c)cos^2A/2` 0:05:34

`a(cosC-cosB)=2(b-c)cos^2A/2`

`a(cosC-cosB)=2(b-c)cos^2A/2` 0:05:40

`a(cosC-cosB)=2(b-c)cos^2A/2`

For any triangle 0:07:43

For any triangle ABC, prove that `a(cos-C-cos B)\\ =\\ 2\\ (b c)\\ cos^2A/2`...

In any triangle 0:17:53

In any triangle ABC, prove the following:(cosC-cosB)=2(b-c)cos^2A/2.

In `triangle ABC`, 0:03:26

In `triangle ABC`, prove that `2(bc cos A +ac cos B +ab cos C)=a^2+b&2+c^2`.

Prove that :acos(B-C)/2 0:04:58

Prove that :acos(B-C)/2 =(b+c)cos(B+C)/2,CLASS 11 MATHEMATICS,NCERT,#themathsgurudev,trigo functions

`a(cosB+cosC) = 2(b+c)sin^2(A/2)` 0:05:30

`a(cosB+cosC) = 2(b+c)sin^2(A/2)`

For any triangle 0:04:12

For any triangle ABC, prove that `a(cos-C-cos B)\\ =\\ 2\\ (b c)\\ cos^2A/2`...

#themathsgurudev,For any triangle 0:05:46

#themathsgurudev,For any triangle ABC, prove that :sin(B-C)/2=(b-c)/a cosA/2, CLASS 11th MATHEMATICS

`(b-c)/a cos^2(A/2)+(c-a)/bcos^2(B/2)+(a-b)/c cos^2(C/2)=` 0:05:40

`(b-c)/a cos^2(A/2)+(c-a)/bcos^2(B/2)+(a-b)/c cos^2(C/2)=`

`(b-c)/acos^2 (A/2)+(c-a)/bcos^2(B/2)+(a-b)/c cos^2(C/2)=` 0:02:50

`(b-c)/acos^2 (A/2)+(c-a)/bcos^2(B/2)+(a-b)/c cos^2(C/2)=`

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Prove that:- 4(bc cos²A/2 + ca cos²B/2 + ab cos²C/2 ) = (a + b + c)²

For any triangle 0:05:12

For any triangle ABC, prove that `sin(B-C)/2=(b-c) /a ( cosA/2)`...

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In any ∆ABC Prove that (b-c)/(a)cos(A)/(2)=sin(B-C)/(2)

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In a `Delta ABC` if `cosA/(bcosC+ccosB)+cosB/(c cosA+acosC)+cosC/(acosB+bcosA)=(a^2+b^2+c^2)/(K...

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In any ∆ABC, prove cos2A/a^2 - cos2B/b^2 = 1/a^2 - 1/b^2

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In `DeltaABC` prove that `a^2+b^2+c^2=2(bccosA+cacosB+abcosC)`

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Prove that:- (cos2A/a²) - (cos2B/b²) = 1/a² - 1/b²