In a `Delta ABC` with usual notations, if `(a)/(cos A)=(b)/(cos B)=(c )/(cos C)`, then the

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In a ` Delta A B C ,` prove the following : `(c-b\ cos A)/(b-c\ cos A)=(cosB)/(cos C)` In a ` Delta A B C ,` prove the following : `(c-b\ cos A)/(b-c\ cos A)=(cosB)/(cos C)`
With usual notatins, if in a `Delta ABC,(b+c)/(11)=(c+a)/(12) =(a+b)/(13),` then prove that `(cos A) With usual notatins, if in a `Delta ABC,(b+c)/(11)=(c+a)/(12) =(a+b)/(13),` then prove that `(cos A)
Given(b+c)/(11) = (c+a)/(12) = (a+b)/(13)for a Delta ABCwith usual notation. If(cos A)/(alpha) =... Given(b+c)/(11) = (c+a)/(12) = (a+b)/(13)for a Delta ABCwith usual notation. If(cos A)/(alpha) =...
In any ` Delta A B C ,` prove that: `(cos A)/a+(cos B)/b+(cos C)/c=(a^2+b^2+c^2)/(2a b c)` In any ` Delta A B C ,` prove that: `(cos A)/a+(cos B)/b+(cos C)/c=(a^2+b^2+c^2)/(2a b c)`
In Delta ABC ,with usual notations prove that : b^(2) = c^(2) +a^(2) - 2 ca cos B . | CLASS 1... In Delta ABC ,with usual notations prove that : b^(2) = c^(2) +a^(2) - 2 ca cos B . | CLASS 1...
Prove vectorically that 𝑏=𝑐 cos⁡𝐴+𝑎 cos⁡𝐶 Prove vectorically that 𝑏=𝑐 cos⁡𝐴+𝑎 cos⁡𝐶
If any triangle ABC with usual notations prove `c=a cos B + b cos A`. If any triangle ABC with usual notations prove `c=a cos B + b cos A`.
If in a ΔABC, (cos A)/a = (cos B)/b = (cos C)/c, then find the measures of angles A, B, C. If in a ΔABC, (cos A)/a = (cos B)/b = (cos C)/c, then find the measures of angles A, B, C.