If A - B - C be the angle of a triangle- the - A - B -tan A -tan BA- 1B- -1C- 2D- -2

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Sum of Trigonometric Ratios in Terms of Their Product

If A , B , C ...

Question

$I f A, B, C$ be the angle of a triangle, the $\sum \frac{c o t A + c o t B}{t a n A + t a n B}$

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\sum \frac{c o t A + c o t B}{t a n A + t a n B} =

\frac{t a n \frac{A}{2} - t a n \frac{B}{2}}{t a n \frac{A}{2} + t a n \frac{B}{2}}

If in a right-angled triangle ABC angles A and B are acute, then evaluate

1 + $\frac{t a n A}{t a n B}$ =

If A, B, C are the angles of a triangle, then
$sin (\frac{B + C}{2}) =$ ___.

A, B, C

tan \frac{A - B}{2} = cot (\frac{C}{2} + B)

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