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(cos A)/(sin B sin C)+(cos B)/(sin C sin...

`(cos A)/(sin B sin C)+(cos B)/(sin C sin A)+(cos C)/(sin A sin B)=2`

Answer

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if A + B + C = pi then (cos A) / (sin B sin C) + (cos B) / (sin C sin A) + (cos C) / (sin A sin B) =

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Knowledge Check

  • If : A+B+C=pi, "then"" "sin ^(2) A +sin^(2)B - sin ^(2)C= A) 2 cos A * cos B * sin C B) 2 cos B * cos C * sin A C) 2 sin A * sin B * cos C D) 2 sin B * sin C * cos A

    A
    `2 cos A * cos B * sin C`
    B
    `2 cos B * cos C * sin A`
    C
    `2 sin A * sin B * cos C`
    D
    `2 sin B * sin C * cos A`

  • If : A+B+C=pi, "then" : sin 2A + sin 2 B - sin 2 C= A) 4 sin A * cos B * cos C B) 4 sin B * sin C * cos A C) 4 sin C * cos A * cos B D) 4 sin A * sin B * sin C

    A
    `4 sin A * cos B * cos C`
    B
    `4 sin B * sin C * cos A `
    C
    `4 sin C * cos A * cos B`
    D
    `4 sin A * sin B * sin C`

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    cos(A+B)+sin C=sin(A+B)-cos C

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    Assertion A:In/_ABC,sum(cos A)/(sin B sin C)=2 Reason R:In/_ABC,sin A+sin B+sin C=4(cos A)/(2)(cos B)/(2)(cos C)/(2)

    (sin (BC)) / (cos B cos C) + (sin (CA)) / (cos C cos A) + (sin (AB)) / (cos A cos B) = 0

    (b-a cos c)sin A=a cos A sin c

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