If in a - ABC- cos A - 2cos Ccos A - 2cos B - sin Bsin C- then the triangle is

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Triangles

If in a Δ A...

Question

If in a $Δ A B C,$ $\frac{cos A + 2 cos C}{cos A + 2 cos B} = \frac{sin B}{sin C}$ , then the triangle is

Isoscales

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Right angled

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Equilateral

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None of these

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\frac{c o s A + 2 c o s C}{c o s A + 2 c o s B} = \frac{s i n B}{s i n C}

\frac{cos A + 2 cos C}{cos A + 2 cos B} = \frac{sin B}{sin C}

A B C

ln Δ A B C, \sum \frac{cos A}{sin B sin C} = 2

ln Δ A B C, sin A + sin B + sin C = 4 cos \frac{A}{2} cos \frac{B}{2} cos \frac{C}{2}

Δ A B C

cos A = \frac{sin B}{sin C}

In △ A B C if cos A + sin A - \frac{2}{cos B + sin B} = 0, th e n the triangle is an

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